Groneman, Carol
Facts On File Publications, 1985
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Dewar, Diane M., author
Jones & Bartlett Learning, 2011
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McCloskey, Robert G., author
The University of Chicago Press, 1962
Buku Teks
American Psychological Association, 1991
Buku Referensi
Barrett, Margreth
Emanuel Law Outlines, Inc., 1991
Buku Teks