edited by Oon-Seng Tan
Cengage Learning, 2009
Buku Teks
edited by Peter A.J. Bouhuijs, H.G. Schmidt, H.J.M. van Berkel
Network Publications, 1993
Buku Teks
Robertson, S. Ian, author
Psychology Press, 2001
Buku Teks
Savin-Baden, Maggi, author
Routletge , 2007
Buku Teks
Teena Clouston, author
Wiley, 2010
Buku Teks