Cita APA (7a ed.)
Ardila Vásquez, J., Hertford, R., Rocha, A., & Trujillo, C. (1975). Returns to agricultural research in Colombia. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Ardila Vásquez, J., R. Hertford, A. Rocha, y Catalina Trujillo. Returns to Agricultural Research in Colombia. International Center for Tropical Agriculture, 1975.
Cita MLA (9a ed.)
Ardila Vásquez, J., et al. Returns to Agricultural Research in Colombia. International Center for Tropical Agriculture, 1975.
Precaución: Estas citas no son 100% exactas.