Cita APA (7th ed.)

Meyer, W. B. (1996). Human impact on the earth. Univ. Pr.

Cita Chicago (17th ed.)

Meyer, William B. Human Impact on the Earth. Cambridge: Univ. Pr, 1996.

Cita MLA (9th ed.)

Meyer, William B. Human Impact on the Earth. Univ. Pr, 1996.