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Cengage Learning Asia, 2006
Buku Teks
Hoyer, Wayne D., author
South Western Cengage Learning, 2012
Buku Teks
Schiffman, Leon G., author
Prentice-Hall, 1997
Buku Teks
Walters, C. Glenn, author
South Western Publishing, 1989
Buku Teks
Schiffman, Leon G., author
Pearson, 2015
Buku Teks