Ok, so you just want to give it a whirl. No worries, just:
- Download a bibliography style file such as h-physrev3.bst, into the directory where your document is. (There are many options about - just look around the web.)
- Create your bibliography database file by downloading (into the directory where your document is) and editing the example file tau.bib.
- Remove any \begin{thebibliography} ... \end{thebibliography} commands from your document.
- Just before the \end{document} command, add
\bibliographystyle{h-physrev3.bst}
\bibliography{tau}
(Alternatively, just download and edit this example file.) - When processing the file, you need to do: latex filename, bibtex filename, latex filename, latex filename.