Cita APA (7a ed.)
Singh, B. (2000). Successful farmer to farmer diffusion of improved cowpea seeds in northern Nigeria.
Cita Chicago Style (17a ed.)
Singh, B. Successful Farmer to Farmer Diffusion of Improved Cowpea Seeds in Northern Nigeria. 2000.
Cita MLA (9a ed.)
Singh, B. Successful Farmer to Farmer Diffusion of Improved Cowpea Seeds in Northern Nigeria. 2000.
Precaución: Estas citas no son 100% exactas.