Citation style for CS publications
Most CS conference publications use the ACM BibTeXstyle file (or the plain style file) to cite papers, and that constitutes the de facto 'style'. Different journals and conferences often prescribe their own citation format via a different BibTeX style.

So the short answer to your question is that there isn't a common style, and if you believe in using BibTex, then merely changing the style file can allow you to accommodate different styles.