Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

Paul, Eldor Alvin, e F. E. Clark. Soil Microbiology and Biochemistry. San Diego: Academic Press, 1989.

Citatione MLA (9a ed.)

Paul, Eldor Alvin, e F. E. Clark. Soil Microbiology and Biochemistry. Academic Press, 1989.