Graham, Billy
World Wide Publications, 1984
Buku Teks
Gaarder, Jostein, 1952-, author
Mizan Pustaka, 2017
Buku Teks
Moe, Dean, author
Augsburg Publishing House, 1985
Buku Referensi
Diah Utami Putri, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Rifqi Achmad Sazali, author
Universitas Indonesia, 2017
UI - Tesis (Membership)