Cita APA (7th ed.)

Gregor, C. B. (1988). Chemical cycles in the evolution of the earth. Wiley.

Cita Chicago (17th ed.)

Gregor, C. Bryan. Chemical Cycles in the Evolution of the Earth. New York: Wiley, 1988.

Cita MLA (9th ed.)

Gregor, C. Bryan. Chemical Cycles in the Evolution of the Earth. Wiley, 1988.