Valachi, Bethany, author
Posturedontics Press, 2008
Buku Teks
Barnett, Jeffrey E., author
American Psychological Association, 2012
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Burt, Brian A., author
An academic Internet Publishers, 2007
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Wiley Blackwell, 2010
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Convissar, Robert A, author
Missouri : Mosby, 2016
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