Byham, William C.
DDI Press, 2007
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Byham, William C.
FT Press , 2002
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Lembaga Penerbit Fakultas Ekonomi Universitas Indonesia, 2013
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Kuratko, Donald F., author
Pearson, pearson education International, 2009
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Himstreet, William C.
Kent Publishing Company, 1984
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