Cita APA (7a ed.)
Spielman, D. J., Mekonnen, D. K., & Alemu, D. (2012). Seed, fertilizer, and agricultural extension in Ethiopia: Summary of ESSP working paper 20. 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: Summary of ESSP Working Paper 20. International Food Policy Research Institute, 2012.
Cita MLA (9a ed.)
Spielman, David J., et al. Seed, Fertilizer, and Agricultural Extension in Ethiopia: Summary of ESSP Working Paper 20. International Food Policy Research Institute, 2012.
Precaución: Estas citas no son 100% exactas.