Caldwell, J. C. (1969). African rural-urban migration: The movenent to Ghana's towns. Columbia University.
芝加哥风格引文Caldwell, John C. African Rural-urban Migration: The Movenent to Ghana's Towns. New York: Columbia University, 1969.
MLA引文Caldwell, John C. African Rural-urban Migration: The Movenent to Ghana's Towns. Columbia University, 1969.
警告：这些引文格式不一定是100％准确.