American Psychological Assosiation, 2007
Majalah, Jurnal, Buletin
Lawrence M. Friedman ... [and ather]
Springer, 2015
Buku Teks
Michael J. Ford
Elsevier, 2005
Buku Teks
editors, Raymond Daley and Henry Miller
Livingstone, 1971
Buku Teks
Pocock, Stuart J., author
Wiley, 1983
Buku Teks