Cita APA (7a ed.)
Douglas, J. E. (1983). Organizing and operating a seed certifying authority. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Douglas, Johnson E. Organizing and Operating a Seed Certifying Authority. International Center for Tropical Agriculture, 1983.
Cita MLA (9a ed.)
Douglas, Johnson E. Organizing and Operating a Seed Certifying Authority. International Center for Tropical Agriculture, 1983.
Precaución: Estas citas no son 100% exactas.