Edited by Steven K. Huprich
American Psychological Association, 2015
Buku Teks
Elisabeth Kals, Jurgen Maes, editors
[Springer-Verlag;;;, ], 2012
eBooks
edited by Yiorgos Apostolopoulos, Stella Leivadi and Andrew Yiannakis
Routledge, 1996
Buku Teks
Smith, Barry D.
Prentice-Hall, 1982
Buku Teks
John Wiley & Sons, 2000
Buku Teks