ebrary, Inc, Adewuyi, B., & Chukwu, K. (2012). Soil fertility: Characteristics, processes and management. Nova Science Publishers.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, Bolanle Adewuyi, agus Kayin Chukwu. Soil Fertility: Characteristics, Processes and Management. New York: Nova Science Publishers, 2012.
Lua MLA (9ú heag.)ebrary, Inc, et al. Soil Fertility: Characteristics, Processes and Management. Nova Science Publishers, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.