Jones, Gregg R.
Westview Press, 1989
Buku Teks
Reyess, Elizabeth, author
Tuttle Publishing, 2012.
Buku Teks
Jones, Rae Desmond
Makar, [1973]
Buku Teks
Button, John, author
Cassell, 1995
Buku Referensi
Dira Almira, author
2018
UI - Skripsi (Membership)