Shimko, Keith L., 1962-, author
Wadsworth and Cengage Learning, 2013
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Carney, Jan K., author
Jones Bartlett Learning, 2016
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Robbins, Stephen P., author
Prentice-Hall, 1997
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Robbins, Stephen P., author
Prentice-Hall, 1993
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1993
Buku Teks