Cita APA (7a ed.)
Powell, J., & Mohamed-Saleem, M. (1987). Nitrogen and phosphorus transfers in a crop-livestock system in West Africa. Elsevier.
Cita Chicago Style (17a ed.)
Powell, J.M, y M.A Mohamed-Saleem. Nitrogen and Phosphorus Transfers in a Crop-livestock System in West Africa. Elsevier, 1987.
Cita MLA (9a ed.)
Powell, J.M, y M.A Mohamed-Saleem. Nitrogen and Phosphorus Transfers in a Crop-livestock System in West Africa. Elsevier, 1987.
Precaución: Estas citas no son 100% exactas.