ebrary, Inc, Adewuyi, B., & Chukwu, K. (2012). Soil fertility: Characteristics, processes and management. Nova Science Publishers.
Chicago-referens (17:e uppl.)ebrary, Inc, Bolanle Adewuyi, och Kayin Chukwu. Soil Fertility: Characteristics, Processes and Management. New York: Nova Science Publishers, 2012.
MLA-referens (9:e uppl.)ebrary, Inc, et al. Soil Fertility: Characteristics, Processes and Management. Nova Science Publishers, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.