Gans, Herbert J.
The Free Press, 1982
Buku Teks
Abrahamson, Mark
Prentice-Hall, 1980
Buku Teks
Jan Lin; Christopher Mele
Routledge, 2005
Buku Teks
edited by Ronan Paddison
Sage Publications, 2001
Buku Referensi
edited by R.E. Pahl
Pergamon Press, 1968
Buku Teks