Lavallee, David, author
McGraw-Hill, Higher Education, 2008
Buku Teks
Cashmore, Ellis
Koleksi Publik
Thatcher, Joanne, author
Learning Matters, 2012
Buku Teks
edited by Judy L. Van Raalte, Britton W. Brewer
American Psychological Association, 2002
Buku Teks
Cashmore, Wllis
Routledge, 2002
Buku Teks