Cita APA

Gorse, J. E., & Steeds, D. R. (1987). Desertification in the Sahelian and Sudanian zones of west Africa. Washington: World Bank.

Citación estilo Chicago

Gorse, Jean Eugene, and David R. Steeds. Desertification in the Sahelian and Sudanian Zones of West Africa. Washington: World Bank, 1987.

Cita MLA

Gorse, Jean Eugene, and David R. Steeds. Desertification in the Sahelian and Sudanian Zones of West Africa. Washington: World Bank, 1987.