Ary Ginanjar Agustian, author
Arga Wijaya Persada, 2001
Buku Teks
Ratna Sulistami D., author
Gramedia Pustaka Utama, 2006
Buku Teks
Ricci Vicika, author
1997
UI - Skripsi (Membership)
Siagian, Eva Grace Rouli, author
2002
UI - Skripsi (Membership)
Bella Ingranurindani, author
Fakultas Psikologi Universitas Indonesia, 2008
UI - Skripsi (Open)