Lerner, Eugene M., author
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Buku Teks
Franks, J.R., author
John Wiley & Sons, 1979
Buku Teks
Stengel, Donald N., author
Business Expert, 2011
Buku Teks
Reeve, James M., 1953-, author
South Western Cengage Learning, 2012
Buku Teks
Stair, Ralph M., Jr., author
Boyd & Fraser Publishing, 1992
Buku Teks