Cita APA (7th ed.)

Krauskopf, K. B. (1974). The third planet: An invitation to geology. Freeman, Cooper & Co.

Cita Chicago (17th ed.)

Krauskopf, Konrad B. The Third Planet: An Invitation to Geology. San Francisco, California: Freeman, Cooper & Co, 1974.

Cita MLA (9th ed.)

Krauskopf, Konrad B. The Third Planet: An Invitation to Geology. Freeman, Cooper & Co, 1974.