Cita APA (7a ed.)
Singh, S., & Allen, D. J. (1979). Cowpea pests and diseases. International Institute of Tropical Agriculture.
Cita Chicago Style (17a ed.)
Singh, S.R, y David J. Allen. Cowpea Pests and Diseases. International Institute of Tropical Agriculture, 1979.
Cita MLA (9a ed.)
Singh, S.R, y David J. Allen. Cowpea Pests and Diseases. International Institute of Tropical Agriculture, 1979.
Precaución: Estas citas no son 100% exactas.