The Association for Computing Machinery, or ACM, uses its own citation and documnet formatting. You can view a sample LaTeX2e file here.
You may also want to consult the Author's Guide to Preparing ACM SIG Proceedings.
BibTeX is another resource that you will be using. BibTex stands for a tool and a file format which are used to describe and process lists of references, mostly in conjunction with LaTeX documents. Consult the BibTeX website for more information.
