I\'m looking for a way to define new BibTeX style or to customize existing one. I have two reasons for this:
You can try custom-bib :
This is the custom-bib package for generating customized BibTeX bibliography
styles from a generic file by means of the docstrip program that is part of
the LaTeX2e installation.
I'd recommend biblatex. It's not included yet with most TeX distributions at the authors request, but it is completely usable and very well documented. I think it will be less painful to use to get what you want, and also a better investment for the future as I think biblatex will quickly become the favored standard once it has it's 1.0 release.
Find a standard bibtex stylesheet for your citation style: IEEE, ACM, MLA, specific journal, etc.
What style are you trying to conform to?
I've used latex makebst
to generate new one :)