edited by Sarah Gehlert; Teri Arthur Browne
John Wiley & Sons, 2012
Buku Teks
Smith, Michael J.
Oxford University Press, 2010
Buku Teks
Browning, Colette J
Livingstone, 2005
Buku Teks
edited by Marc J. Schabracq, Jacques A.M. Winnubst, Cary L. Cooper
John Wiley & Sons, 2003
Buku Teks
Golightley, Malcom
Learning matters Ltd., 2008
Buku Teks