APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Paul, E.A, and F.E Clark. Soil Microbiology and Biochemistry. London: Academic Press, 1989.

MLA (9th ed.) Citation

Paul, E.A, and F.E Clark. Soil Microbiology and Biochemistry. Academic Press, 1989.