Cita APA (7a ed.)
Singh, S. (1978). Resistance to pests of cowpea in Nigeria.
Cita Chicago Style (17a ed.)
Singh, S.R. Resistance to Pests of Cowpea in Nigeria. 1978.
Cita MLA (9a ed.)
Singh, S.R. Resistance to Pests of Cowpea in Nigeria. 1978.
Precaución: Estas citas no son 100% exactas.