Thiederman, Sondra
Lexington books, 1991
Buku Teks
Holtz, Shel, author
[American Management Association, ], 2004
eBooks
Yusuf Arianto, author
Fakultas Psikologi Universitas Indonesia, 2013
UI - Tesis (Membership)
Dina Lutfia, author
2013
UI - Tesis (Membership)
edited by, Elise C. Smith and Louise Fiber Luce
Nuwbury House Publishers, 1979
Buku Teks