Petersen, William, author
Macmillan, 1969
Buku Teks
Aris Ananta, author
Demographic Institute FE UI, 1991
Buku Teks
Grindstaff, Carl F., author
Christopher Publishing House, 1981
Buku Teks
Hartley, Shirley Foster, author
Prentice-Hall, 1972
Buku Teks
United Nations
United Nations, 1987
Buku Teks