Cita APA (7a ed.)
Spielman, D. J., Mekonnen, D. K., & Alemu, D. (2011). Seed, fertilizer, and agricultural extension in Ethiopia. International Food Policy Research Institute.
Cita Chicago Style (17a ed.)
Spielman, David J., Dawit Kelemework Mekonnen, y Dawit Alemu. Seed, Fertilizer, and Agricultural Extension in Ethiopia. International Food Policy Research Institute, 2011.
Cita MLA (9a ed.)
Spielman, David J., et al. Seed, Fertilizer, and Agricultural Extension in Ethiopia. International Food Policy Research Institute, 2011.
Precaución: Estas citas no son 100% exactas.