Παραπομπή APA

Paul, E. A. Soil microbiology, ecology and biochemistry (Fourth edition.).

Παραπομπή Chicago Style

Paul, Eldor Alvin. Soil Microbiology, Ecology and Biochemistry. Fourth edition.

Παραπομπή MLA

Paul, Eldor Alvin. Soil Microbiology, Ecology and Biochemistry. Fourth edition.