Caldwell, J. C. (1969). African rural-urban migration: The movenent to Ghana's towns. Columbia University.
Lua i Stíl Chicago (17ú heag.)Caldwell, John C. African Rural-urban Migration: The Movenent to Ghana's Towns. New York: Columbia University, 1969.
Lua MLA (9ú heag.)Caldwell, John C. African Rural-urban Migration: The Movenent to Ghana's Towns. Columbia University, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.