Dyfyniad APA

ebrary, Inc, Adewuyi, B., & Chukwu, K. (2012). Soil fertility: Characteristics, processes and management. Nova Science Publishers.

Dyfyniad Arddull Chicago

ebrary, Inc, Bolanle Adewuyi, and Kayin Chukwu. Soil Fertility: Characteristics, Processes and Management. New York: Nova Science Publishers, 2012.

Dyfyniad MLA

ebrary, Inc, et al. Soil Fertility: Characteristics, Processes and Management. Nova Science Publishers, 2012.

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