Long, Roberrt H.
Robert Morris Associates , 1990
Buku Teks
Rosen, Robert H.
AMA Membership Publications , 1986
Buku Teks
Garland Publishing, Inc., 1984
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Wold, Geoffrey H.
Bankers Publishing Company, 1989
Buku Teks
Prichard, James W.
John Wiley & Sons, 1965
Buku Teks