APA (7th ed.) Citation

Walker, T., Hash, T., Rattunde, F., & Weltzien, E. (2016). Improved Crop Productivity for Africa’s Drylands. Washington, DC: World Bank.

Chicago Style (17th ed.) Citation

Walker, Tom, Tom Hash, Fred Rattunde, and Eva Weltzien. Improved Crop Productivity for Africa’s Drylands. Washington, DC: World Bank, 2016.

MLA (8th ed.) Citation

Walker, Tom, et al. Improved Crop Productivity for Africa’s Drylands. Washington, DC: World Bank, 2016.