Encyclopedia of psychology
edited by Raymond J. Corsini
New York : John Wiley & sons, 1994,
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Encyclopedia of psychology
edited by Raymond J. Corsin
New York : John Wiley & Sons, 1994,
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The Gale encyclopedia of psychology
Bonnie Strickland, editor
Gale Group, 2001
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International encyclopedia of psychology; Volume one
edited by Frank N. Magill
Fitzroy Dearborn, 1996
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International encyclopedia of psychology; Volume two
edited by Frank N. Magill
Fitzroy Dearborn, 1996
 Buku Referensi