Weston, J. Fred [John Fred], 1916-
McGraw-Hill, 2001
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Sherman, Andrew J.
[American Management Association;, ], 2011
eBooks
Partner, Simon
New Jersey, Prentice-Hall1991,
Buku Referensi
Coyle, Brian
Canterbury CIB , 2000
Buku Teks
Gaughan, Patrick A.
John Wiley & Sons, 2002
Buku Teks SO