Citazione Stile APA (7a Edizione)

Paul, E. (1989). Soil microbiology and biochemistry.: E.A. Paul, F.E. Clark. Calif academic Pr.

Citazione stile Chigago Style (17a edizione)

Paul, E.A. Soil Microbiology and Biochemistry.: E.A. Paul, F.E. Clark. San Diego: Calif academic Pr, 1989.

Citatione MLA (9a ed.)

Paul, E.A. Soil Microbiology and Biochemistry.: E.A. Paul, F.E. Clark. Calif academic Pr, 1989.