Ruskan, John
Random House, 1993
Buku Teks
Heryansyah, author
Fakultas Psikologi Universitas Indonesia, 2015
UI - Skripsi (Membership)
Swami Ajarananda, author
Thai Bidhaya Press, [date of publication not identified]
Buku Klasik
Mauriac, Francois
Longmans, , 1940
Buku Teks
Kolko, Jon, author
Elsevier, 2011
Buku Teks