See the http://rmarkdown.rstudio.com/rtf_document_format.html{online
documentation} for additional details on using the rtf_document format.
R Markdown documents can have optional metadata that is used to generate a
document header that includes the title, author, and date. For more details
see the documentation on R Markdown metadata.
R Markdown documents also support citations. You can find more information on
the markdown syntax for citations in the
http://rmarkdown.rstudio.com/authoring_bibliographies_and_citations.html{Bibliographies
and Citations} article in the online documentation.