Farrell, Warren
[American Management Association, ], 2005
eBooks
Legato, Marianne J
Gramedia Pustaka Utama, 2006
Buku Teks
Hollander, Dory
Harper Prennial, 1995
Buku Teks
Mazo, Ellen
Rodale, 2002
Buku Teks
Sandel, Michael J.
Farrar, Staus and Giroux, 2010
Buku Teks