Collins, Heidi, author
[American Management Association, ], 2003
eBooks
Kochtanek, Thomas R., author
Libraries Unlimited , 2002
Buku Teks
Moody, Paul E.
McGraw-Hill, 1983
Buku Teks
Mina, Eli, author
[American Management Association;, ], 2002
eBooks
Rowley, Jennifer, author
Gower , 2000
Buku Teks