SpringerLink (Online Service) & Obi, A. (2011). Institutional constraints to small farmer development in Southern Africa. Wageningen Academic Publishers.
Chicago-referens (17:e uppl.)SpringerLink (Online Service) och Ajuruchukwu Obi. Institutional Constraints to Small Farmer Development in Southern Africa. Wageningen: Wageningen Academic Publishers, 2011.
MLA-referens (9:e uppl.)SpringerLink (Online Service) och Ajuruchukwu Obi. Institutional Constraints to Small Farmer Development in Southern Africa. Wageningen Academic Publishers, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.