Caldwell, J. C. (1975). The Sahelian drought and its demographic implications. Overseas Liaison Committee, American Council on Education.
Lua i Stíl Chicago (17ú heag.)Caldwell, John C. The Sahelian Drought and Its Demographic Implications. [Washington]: Overseas Liaison Committee, American Council on Education, 1975.
Lua MLA (8ú heag.)Caldwell, John C. The Sahelian Drought and Its Demographic Implications. Overseas Liaison Committee, American Council on Education, 1975.
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