Fawcett, James T.
Population Council, 1970
Buku Teks
edited by James F. Phillips, John A. Ross
Clarendon Press, 1992
Buku Teks
The University of Mincigan, 1969
Buku Teks
1982,
Buku Teks
Jay Teachman ... [and others]
Comm. and family Study Center, 1979
Buku Teks