If you use the BibTeX program by Oren Patashnik (highly recommended if
you need a bibliography of more than a couple of titles) to maintain
your bibliography, you don't use the
environment. Instead, you include the lines
style refers to a file
style.bst, which defines how
your citations will look. The standard styles distributed with BibTeX
plain, but entries are in order of citation.
plain, but more compact labels.
In addition, numerous other BibTeX style files exist tailored to the demands of various publications.
The argument to
\bibliography refers to the file
bibfile.bib, which should contain your database in BibTeX
format. Only the entries referred to via
will be listed in the bibliography.