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