Pack-Brown, Sherlon P., author
Sage, 2003
Buku Teks
edited by Freddy A. Paniagua, Ann-Marie Yamada
Academic Press, 2013
eBooks
Hall, Gordon C. Nagayama, author
Prentice-Hall, 2002
Buku Teks
edited by Anthony J. Marsella ... [et al.]
Springer, 2008
Buku Teks
Brammer, Robert, author
Thomson, 2004
Buku Teks