get_cites retrieves citations for variables in the CSPP dataset. Users
can print the citations to the console, save them as dataframes, and write
them to multiple file types (csv, txt). Citations can be written in one of
multiple formats (plaintext, bib). Supply variable names that need to be
cited with the var_names argument. The function prints user-supplied
variable names that do not match any in the CSPP dataset by default (print_nomatch).
The function also returns the citation for the cspp package and the
CSPP dataset as a whole. We request you cite both if you use this package
for your research.