Blanchard, Ken, author
Bareett-Koehler, 2012
Buku Teks
Maxwell, John C., author
Menuju Insan Cemerlang (MIC), 2015
Buku Teks
Sinek, Simon, author
Portfolio/Penguin, 2009
Buku Teks
Cuervo, Jorge, author
ATD Press, 2015
Buku Teks
Harvard Bussiness School Press, 1990
Buku Teks