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
Croteau, David, author
McGraw-Hill, 2013
Buku Teks