Dubois, Bernard, author
Prentice-Hall, 2000
Buku Teks
Crissel, Andrew, author
Routledge, 1995
Buku Teks
edited by Andrew Goodwin and Garry Whannel
Routledge, 1995
Buku Teks
Corwin, Edward S., author
Holt, Rinehart and Winston, 1966
Buku Teks
Stewart, Jon, author
Hutchinson, 1976
Buku Teks