Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.