Kawasaki, Guy
Portfolio/Penguin, 2011
Buku Teks
edited by Joel Gehman, Michael Lounsbury, Royston Greenwood
Emerald, 2016
eBooks
Schein, Edgar H.
Prentice-Hall, 1980
Buku Teks
Fakultas Psikologi Universitas Indonesia, 2003
UI - Skripsi (Membership)
Yekti Mahardini
Universitas Indonesia, 2003
UI - Skripsi (Membership)