Ortiz, John M., author
Gramedia Pustaka Utama, 2002
Buku Teks
Grant, George
Wolgemuth & Hyatt, Publishers, Inc, 1989
Buku Teks
Harvey, Steve, author
Amistad, an imprint of HarperCollinsPublishers, 2014
Buku Teks
Stevenson, Michael R., author
Westviev Press, 1996
Buku Teks
Dinda Savitri Adriani, author
Fakultas Psikologi Universitas Indonesia, 2020
UI - Skripsi (Membership)