Cambridge University Press, 2020
eBooks
Cervone, Daniel, author
Salemba Humanika, 2012
Buku Teks
Feist, Jess, author
McGraw-Hill, 2006
Buku Teks
Cattell, Raymond B., author
World Book, 1957
Buku Klasik
Ajzen, Icek, author
Open University Press, 2005
Buku Teks