Cita APA (7th ed.)

Krauskopf, K. B. (1979). The third planet: An introduction to earth science (6th ed.). Freeman, Cooper & Co.

Cita Chicago (17th ed.)

Krauskopf, Konrad B. The Third Planet: An Introduction to Earth Science. 6th ed. San Francisco: Freeman, Cooper & Co, 1979.

Cita MLA (9th ed.)

Krauskopf, Konrad B. The Third Planet: An Introduction to Earth Science. 6th ed. Freeman, Cooper & Co, 1979.