edited by Tan Jing Jee & You Poh Seng with Emily Ding
Addison-Wesley Publishing, 1987
Buku Referensi
Russell, Lou, author
ATD Press, 2015
Buku Teks
Dale, Margaret, author
Gramedia, 2003
Buku Teks
Goleman, Daniel, author
Harvard Business School Press, 2001
Buku Teks
Harvard Business School Press, 2004
Buku Teks