Casemore, Roger
Sage Publications, 2006
Buku Teks
Mearns, Dave, author
Sage, 2003
Buku Teks
Mearns, Dave, author
Sage Publications, 2003
Buku Teks
Tolan, Janet, author
Sage, 2003
Buku Teks
Sarah G. Dean, Richard J. Siegert, William J. Taylor.
Wiley-Blackwell, 2012
Buku Teks