For citations in chemistry, the American Chemical Society (ACS) style guide is preferred: ACS Style Guide: A manual for Authors and Editors, 2nd ed., 1997. Call number: SMC Ref QD8.5 A25 1997.
For citations in physics, the American Institute of Physics (AIP) Style Manual is recommended (pdf).
For citations in geology and earth sciences, the U.S. Geological Survey has a writing style guide covering many aspects of report writing. See the section "Preparing References for Survey Reports" for guidelines on citing sources.
