Grindstaff, Carl F.
Christopher Publishing House, 1981
Buku Teks
edited by Geoffrey Hawthorn
Frank Cass, 1978
Buku Teks SO
Aris Ananta
Demographic Institute FE UI, 1991
Buku Teks
Thomlinson, Ralph
California State University, 1976
Buku Teks
Matras, Judah
Prentice-Hall, 1977
Buku Teks