APA (7th ed.) Citation

Britannica Corporation. (1990). Geology [motion pictures]: The rock cycle, minerals and rocks. Encyclopedia Britannica Educational Corporation.

Chicago Style (17th ed.) Citation

Britannica Corporation. Geology [motion Pictures]: The Rock Cycle, Minerals and Rocks. Chicago: Encyclopedia Britannica Educational Corporation, 1990.

MLA (9th ed.) Citation

Britannica Corporation. Geology [motion Pictures]: The Rock Cycle, Minerals and Rocks. Encyclopedia Britannica Educational Corporation, 1990.