Amoruso, Sophia
Penguin, 2014
Buku Teks
Amoruso, Sophia
Noura Books, 2015
Buku Teks
Solovic, Susan Wilson
American Management Association, 2008
eBooks
Chant, Bent
Avon Books, 1994
Buku Teks
Bradberry, John, 1961-
American Management Association, 2011
eBooks