Cousins, Albert N., 1919-, author
John Wiley & Sons, 1979
Buku Teks
Gans, Herbert J., author
The Free Press, 1982
Buku Teks
edited by Ronan Paddison
Sage Publications, 2001
Buku Referensi
Bish, Robert L., author
McGraw-Hill Kogakusha, 1975
Buku Teks
Kennedy, Leslie W
McGraw-Hill Ryerson, 1983
Buku Teks