Gerst, Eric D., author
American Management Association, 2008
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Chang, Gordon G., author
Century, 2001
Buku Teks
Rickards, James, author
Portfolio Penguin, 2015
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Goodacre, J. Kenneth, author
Witherby, 1981
Buku Teks
International Engineering Consortium
International Engineering Consortium, 1997
eBooks