APA-referens (7:e uppl.)

Harris, M. F. e. a. (1976). Investigating the earth (rev. ed.). Houghton Mifflin Co.

Chicago-referens (17:e uppl.)

Harris, Miles F. et. al. Investigating the Earth. rev. ed. Boston: Houghton Mifflin Co, 1976.

MLA-referens (9:e uppl.)

Harris, Miles F. et. al. Investigating the Earth. rev. ed. Houghton Mifflin Co, 1976.