Hyman, Herbert H., author
John Wiley & Sons, 1972
Buku Teks
Pittenger, David J., author
2003
Multimedia
Pittenger, David J., author
2003
Multimedia
Knowles, Caroline, author
Sage, 2003
Buku Teks
Manly, Bryan F. J, author
Cambridge University Press, 1992
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