Cita APA (7a ed.)
Sperling, L., & Cooper, H. (2003). Understanding seed systems and strengthening seed security. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Sperling, L., y H.D Cooper. Understanding Seed Systems and Strengthening Seed Security. International Center for Tropical Agriculture, 2003.
Cita MLA (9a ed.)
Sperling, L., y H.D Cooper. Understanding Seed Systems and Strengthening Seed Security. International Center for Tropical Agriculture, 2003.
Precaución: Estas citas no son 100% exactas.