Cita APA (7th ed.)

Press, F., & Siever, R. (1974). Earth. W. H. Freeman and Co.

Cita Chicago (17th ed.)

Press, Frank, i Raymond Siever. Earth. San Francisco California: W. H. Freeman and Co, 1974.

Cita MLA (9th ed.)

Press, Frank, i Raymond Siever. Earth. W. H. Freeman and Co, 1974.