Rickertsen, Rick, author
[American Management Association, ], 2001
eBooks
Partow, Donna
Zondervan Publishing house, 1998
Buku Teks
Diah Ayu Candraingrum, author
2010
UI - Tesis (Open)
Dindha Vitri Primadini, author
2015
UI - Skripsi (Membership)
Yablonsky, Lewis, author
Wadsworth, 2000
Buku Teks