CSE Style is often used to document sources for papers in the Sciences.
Scientific style and format : the CSE manual for authors, editors, and publishers: T 11 S386 2006 at Surrey, Richmond, Langley and Cloverdale.
ACS Style is often used specifically to document sources for papers in Chemistry.
The ACS style guide : effective communication of scientific information: QD 8.5 A25 2006 at Surrey and Richmond.
Always check with your instructor which citation style you are supposed to use when writing your paper.