Ratner, Carl, author
Lawrence Erlbaum Associates, 2006
Buku Teks
Verkuyten, Maykel, author
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, author
Harper, 1930
Buku Teks
Smith, Peter B., author
Sage, 2013
Buku Teks