Class files

The next two commands are the ones that set the bibliography style and import the bibliography file. See Bibliography management with bibtex for more information.

```  \bibliographystyle{stylename}
\bibliography{bibfile}```

where bibfile is the name of the bibliography .bib file without the extension and stylename is one of the following:

stylename output
`abbrv`
`acm`
`alpha`
`apalike`
`ieeetr`
`plain`
`siam`
`unsrt`