APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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