Cita APA (7a ed.)
Gallopín, G. C. (1997). Perceived goals and indicators. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Gallopín, Gilberto C. Perceived Goals and Indicators. International Center for Tropical Agriculture, 1997.
Cita MLA (9a ed.)
Gallopín, Gilberto C. Perceived Goals and Indicators. International Center for Tropical Agriculture, 1997.
Precaución: Estas citas no son 100% exactas.