Gladwell, Malcolm, 1963-
David and Goliath: underdogs, misfits, and the art of battling giants
Back Bay Books, 2015
 Buku Teks
Gladwell, Malcolm, 1963-
David and Goliath : underdogs, misfits, and the art of battling giants
AudioGO, 2013
 Buku Teks
McGinnis, Alan Loy
Menumbuhkan motivasi memupuk semangat memetik yang terbaik
Pustaka Tangga, 1991
 Buku Teks
Swartz, Greg
Leadership lessons: 10 keys to success in life and business
American Society for Training & Development, 2008
 eBooks
Halvorson, Heidi Grant-, 1973-
Focus: use different ways of seeing the world for success and influence
Plume Penguin Group, 2014
 Buku Teks