Curtin, Steve, author
[American Management Association, ], 2013
eBooks
Aurelio Lopez-Tarruella
T.M.C. Asser Press, 2012
eBooks
Kofman, Fred, author
Sounds True , 2006
Buku Teks
Miletsky, Jay, author
Course Technology Cengage Learning, 2010
Buku Teks
Chen, Chris, author
McGraw-HIll , 2005
Buku Teks