Bachkirova, Tatiana, author
McGraw-Hill, 2011
Buku Teks
Ian K. Pepper, editor
Learning Matters, 2011
Buku Teks
Hoffer, Eric, author
NJ : Hopewell Publications, 2009
Buku Teks
Levine, Joanne, author
Pearson, 2013
Buku Teks
Lundin, William, 1923- , author
American Management Association, 2009
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