Zanden, James W. Vander, author
McGraww-Hill, 1996
Buku Teks
Gillin, John Lewis, author
Macmillan, 1942
Buku Teks
Caplow, Theodore
Prentice-Hall, 1971
Buku Teks
Penguin , [date of publication not identified]
Buku Teks
Elias, Norbert
Hutchinson , 1978
Buku Teks