Dobler, Donald W., author
McGraw-Hill, 1996
Buku Teks
Joseph L. Cavinato and Ralph G. Kauffman, editors in chief
McGraw-Hill, 1999
Buku Referensi
Baily, P.J.H.
Chapman and Hall , 1973
Buku Teks
Dobler, Donald W., author
McGraw-Hill, 1984
Buku Teks
Anklesaria, Jimmy, author
American Management Association, 2008
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