APA

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

Chicago

Paul Eldor Alvin, Clark F E, . 1989. Soil microbiology and biochemistry. New York: Academic Press.

Harvard

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

MLA

Paul Eldor Alvin, Clark F E, . Soil microbiology and biochemistry. New York: Academic Press. 1989.