Cita APA (7th ed.)

Feder, G., Willett, A., & Zijp, W. (1999). Agricultural extension: Generic challenges and the ingredients for solutions. World Bank.

Cita Chicago (17th ed.)

Feder, Gershon, Anthony Willett, i Willem Zijp. Agricultural Extension: Generic Challenges and the Ingredients for Solutions. Washington, D.C: World Bank, 1999.

Cita MLA (9th ed.)

Feder, Gershon, et al. Agricultural Extension: Generic Challenges and the Ingredients for Solutions. World Bank, 1999.