Walters, Joel
Lawrence Erlbaum Associates, 2005
Buku Teks SO
edited by Marianne Hundt, Sandra Mollin, Simone E. Pfenninger
Cambridge University Press, 2017
Buku Teks SO
Modden, David
New York, Twayne, 1964
Buku Teks
Sugeng Riyanto
Faculty of Humanities University of Indonesia, 2012
Artikel Jurnal
Gerry T.M. Altmann edited by
Psychology Press, 1997
Buku Teks SO