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Neo-tech books, 2000
Buku Teks
Henderson, Justin, author
Rockport, 2000
Buku Teks
Smith, Gary L.
Ballantine Books, 1994
Buku Teks
Russell, Doug, author
[American Management Association, American Management Association], 2011
eBooks
Mestika Zed, 1955-, author
Pustaka Utama Grafiti, 1997
Buku Teks