Verkuyten, Maykel
Psychology Press Taylor & Francis Group, 2005
Buku Teks
edited by Raymond Cochrane and Douglas Carrol
Falmer Press, 1991
Buku Teks
Robinson, James Harvey, 1863-1936
Harper, 1930
Buku Teks
Smith, Peter B.
Sage, 2013
Buku Teks
Green, Arnold W.
McGraw-Hill, 1975
Buku Teks