Cita APA (7a ed.)

Paul, E. A., & Clark, F. E. (1989). Soil microbiology and biochemistry. Academic Press.

Cita Chicago Style (17a ed.)

Paul, Eldor Alvin, y Francis Eugene Clark. Soil Microbiology and Biochemistry. San Diego: Academic Press, 1989.

Cita MLA (8a ed.)

Paul, Eldor Alvin, y Francis Eugene Clark. Soil Microbiology and Biochemistry. Academic Press, 1989.