Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Times Books International, 1985
Buku Teks
Mitchell, Ewan, author
Vertex Books, 1970
Buku Teks
Sam Goldstein, Jack A. Naglieri, editors
Springer, 2014
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Chambers, John C. (John Carlton), 1928-, author
John Wiley & Sons, 1974
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McClure, Wallace, author
Columbia University Press, 1941
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