editedby Robert N. Singer, Heather A. Hausenblas and Christopher M. Janelle
Wiley, 2001
Buku Teks
edited by Robert N. Singer, Milledge Murphey and L. Keith Tennat
Macmillan, 1993
Buku Referensi
Eysenck, Michael W.
Psychology Press, 2005
Buku Teks
Soderman, Sten
Edward Elgar, 2013
Buku Teks
Phillips, Estelle M.
Open University Press, 1994
Buku Teks