Isaacs, Stephen L., author
Human Science Press, 1981
Buku Teks
Weinberg, Roy David
Oceana, 1979
Buku Teks
Georgetown University Press, 1968
Buku Teks
Fawcett, James T., author
Population Council, 1970
Buku Teks
Thomlinson, Ralph, author
Random House , 1976
Buku Teks