Diprima, Peter A., author
McGraw-Hill, 2012
Buku Teks
Elcock, Karen, author
Churchill Livingstone, 2011
Buku Teks
Taylor, James, author
American Management Association, 2006
eBooks
Davis, Sid, author
[American Management Association, ], 2005
eBooks
Richards, Ann, author
Elsevier, 208
Buku Teks