Web Sites

        Resources in Physics     
            Physics resources compiled by the Special Libraries Association.

        NASA ADS           
            Digital library for Astronomy and Physics.

        Physical Reference Data           
            National Institute of Standards and Technology physical reference data.

        Science.gov  
           A search engine for government science information and research results.

 Citing

AIP Style Manual
    American Institute of Physics Style Manual

APA Style.org: Electronic References
    Excerpts from the American Psychological Association Publication Manual.