Cassell, Kay Ann, author
Neal-Schuman, an imprint of the American Library Association, 2013
Buku Teks
Morris, Meghan, author
Sage, 2006
Buku Teks
Pamela Paul, edited
New York Henry Holt and Company, 2014
Buku Teks
Davison, Graeme
Melbourne University Press , 1979
Buku Teks
Hare, Bill, author
[American Management Association, ], 2004
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