Cita APA

Donovan, W. G., & Casey, F. (1998). Soil fertility management in sub-Saharan Africa. World Bank.

Citación estilo Chicago

Donovan, W. G., y Frank Casey. Soil Fertility Management in Sub-Saharan Africa. Washington, D.C: World Bank, 1998.

Cita MLA

Donovan, W. G., y Frank Casey. Soil Fertility Management in Sub-Saharan Africa. World Bank, 1998.