Artikel Jurnal
edited by Quentin H. Stanford
Oxford University Press, 1972
Buku Teks
Berelson, Bernard
The Population Council, 1975
Buku Teks
Population Problems Research Council, Mainichi Newspapers , 1955
Buku Teks
edited by Mindel C. Sheps and Jeanne Clare Ridley
University of Pittsburgh Press, 1965
Buku Teks