APA (7th ed.) Citation

Britannica Corporation. (1990). Geology [motion pictures]: Volcanoes : exploring restless earth; earthquake : expolring the earth's resless crust. Encyclopedia Britannica Educational Corp.

Chicago Style (17th ed.) Citation

Britannica Corporation. Geology [motion Pictures]: Volcanoes : Exploring Restless Earth; Earthquake : Expolring the Earth's Resless Crust. Chicago: Encyclopedia Britannica Educational Corp, 1990.

MLA (9th ed.) Citation

Britannica Corporation. Geology [motion Pictures]: Volcanoes : Exploring Restless Earth; Earthquake : Expolring the Earth's Resless Crust. Encyclopedia Britannica Educational Corp, 1990.