Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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