Gilmer, B. von Haller (Beverly von Haller), 1909-1994, author
McGraw-Hill, 1967
Buku Teks
Eysenck, Michael W., author
Psychology Press, 2005
Buku Teks
Biehler, Robert F.
Houghton Miffiln, [date of publication not identified]
Buku Teks
editor-in-chief Charles D. Spielberger
Hershey, 2004
Buku Teks
Reed, Stephen K., author
Wadsworth and Cengage Learning, 2013
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