diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) Sean Whitton, 2015
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Your name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/pandoc-citeproc-preamble.cabal b/pandoc-citeproc-preamble.cabal
new file mode 100644
--- /dev/null
+++ b/pandoc-citeproc-preamble.cabal
@@ -0,0 +1,26 @@
+name:                pandoc-citeproc-preamble
+version:             1.0.0
+synopsis:            Insert a preamble before pandoc-citeproc's bibliography
+description:         Please see README.md
+homepage:            https://github.com/spwhitton/pandoc-citeproc-preamble
+license:             GPL-3
+license-file:        LICENSE
+author:              Sean Whitton
+maintainer:          spwhitton@spwhitton.name
+category:            Text
+build-type:          Simple
+cabal-version:       >=1.10
+
+executable pandoc-citeproc-preamble
+  hs-source-dirs:      src
+  main-is:             pandoc-citeproc-preamble.hs
+  build-depends:       base >= 4 && < 5
+                     , pandoc-types
+                     , process
+                     , directory
+                     , filepath
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/spwhitton/pandoc-citeproc-preamble
diff --git a/src/pandoc-citeproc-preamble.hs b/src/pandoc-citeproc-preamble.hs
new file mode 100644
--- /dev/null
+++ b/src/pandoc-citeproc-preamble.hs
@@ -0,0 +1,72 @@
+{-
+
+    pandoc-citeproc-preamble --- Insert a preamble before pandoc-citeproc's bibliography
+
+    Copyright (C) 2015  Sean Whitton
+
+    This file is part of pandoc-citeproc-preamble.
+
+    pandoc-citeproc-preamble is free software: you can redistribute it
+    and/or modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation, either version 3 of the
+    License, or (at your option) any later version.
+
+    pandoc-citeproc-preamble is distributed in the hope that it will
+    be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with pandoc-citeproc-preamble.  If not, see
+    <http://www.gnu.org/licenses/>.
+
+-}
+
+import           Data.List        (isPrefixOf)
+import           System.Directory (doesFileExist)
+import           System.FilePath  ((<.>), (</>))
+import           System.Process   (readProcess)
+import           Text.Pandoc.JSON
+
+insertPreamble :: Block -> [Block] -> [Block]
+insertPreamble preamble = foldr step []
+  where
+    step refs@(Div (_, ["references"], _) _) xs = preamble : refs : xs
+    step x xs = x:xs
+
+doPreamble :: Maybe Format -> Pandoc -> IO Pandoc
+doPreamble maybeFormat input@(Pandoc meta blocks) =
+    findPreambleFile format meta
+    >>= maybe (return input)
+    (\file -> do
+          ls <- readFile file
+          return $ Pandoc meta (insertPreamble (lsBlock ls) blocks))
+  where
+    lsBlock ls = RawBlock format ls
+    format = maybe (Format "latex") id maybeFormat
+
+findPreambleFile :: Format -> Meta -> IO (Maybe FilePath)
+findPreambleFile (Format format) meta =
+    case lookupMeta "citeproc-preamble" meta >>= toPath of
+        metadataPreamble@(Just _) -> return metadataPreamble
+        Nothing                   -> tryDatadir
+  where
+    tryDatadir = do
+        defaultPreamble <- (</> "citeproc-preamble" </> "default" <.> format)
+                           <$> getPandocDatadir
+        doesFileExist defaultPreamble >>= \exists ->
+            return $ if exists then Just defaultPreamble else Nothing
+
+getPandocDatadir :: IO FilePath
+getPandocDatadir =
+    drop (length prefix) . head . filter (prefix `isPrefixOf`) . lines
+    <$> readProcess "pandoc" ["--version"] ""
+  where
+    prefix = "Default user data directory: "
+
+toPath                :: MetaValue -> Maybe String
+toPath (MetaString s) = Just s
+toPath _              = Nothing
+
+main :: IO ()
+main = toJSONFilter doPreamble