Maxwell, John C., author
Menuju Insan Cemerlang, 2014
Buku Teks
Ika Nurfitriani Listyanti, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Tesis (Open)
Tannen, Deborah
Mizan Media Utama, 2002
Buku Teks
Ohmae, Kenichi
Binarupa Aksara, 1989
Buku Teks
Andi Qamariel Nur Fajrina, author
2018
UI - Skripsi (Membership)