APA-referens (7:e uppl.)

417061 Tracy, G. R., Tropp, H. E., & Friedl, A. E. (1974). Modern Physical Science. New York : Holt Rinehart and Winston.

Chicago-referens (17:e uppl.)

417061 Tracy, George R., Harry E. Tropp, och Alfred E. Friedl. Modern Physical Science. New York : Holt Rinehart and Winston, 1974.

MLA-referens (9:e uppl.)

417061 Tracy, George R., et al. Modern Physical Science. New York : Holt Rinehart and Winston, 1974.