edited by Michael Banton
Tavistock Publications, 1972
Buku Teks
Greiner, Larry E.
Addison-Wesley Pub. Co., 1988
Buku Teks
Sage, 1986
Buku Teks
Lenski, Gerhard Emman
McGraww-Hill, 1966
Buku Teks
Blau, Peter M., author
John Wiley & Sons, 1964
Buku Teks