Mearns, Dave, author
Sage, 2003
Buku Teks
Lister-Ford, Christine, author
Sage Publications, 2002
Buku Teks
Casemore, Roger
Sage Publications, 2006
Buku Teks
Haney, Hutch, author
Brooks/Cole, 2001
Buku Teks
Shapiro, Jerrold Lee
Brooks/Cole, 1985
Buku Teks