Spengler, J. J., & Duncan, O. D. (1956). Population theory and policy:: Selected readings. Glencoe, Ill.,: Free Press.
Chicago Style CitationSpengler, Joseph J., and Otis Dudley Duncan. Population Theory and Policy:: Selected Readings. Glencoe, Ill.,: Free Press, 1956.
MLA CitationSpengler, Joseph J., and Otis Dudley Duncan. Population Theory and Policy:: Selected Readings. Glencoe, Ill.,: Free Press, 1956.
Warning: These citations may not always be 100% accurate.