edited by Talcott Parsons
Voice of American, 1968
Buku Teks
McCarthy, E. Doyle, author
Routledge, 1996
Buku Teks
Schrag, Clarence C., author
Harper & Row, 1963
Buku Teks
Zanden, James W. Vander, author
John Wiley & Sons, 1979
Buku Teks
Ogburn, William F., author
Houghton Mifflin, 1946
Buku Teks