APA (7th ed.) Zitazioa
(1988). Desertification control and renewable resource management in the Sahelian and Sudanian zones of West Africa. The World Bank.
Chicago Style (17th ed.) Zitazioa
Desertification Control and Renewable Resource Management in the Sahelian and Sudanian Zones of West Africa. Washington D.C: The World Bank, 1988.
MLA (9th ed.) Zitazioa
Desertification Control and Renewable Resource Management in the Sahelian and Sudanian Zones of West Africa. The World Bank, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.