Winnington, Alan
Seven Seas Publishers, 1962
Buku Teks
Rusyanti
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2006
UI - Skripsi Membership
O`Connor, Mark
Megalong Book, 1988
Buku Teks SO
Walker, Bryce S.
Time-Life Books, 1973
Buku Teks SO
Hosseini, Khaled
Penguin Books, 2013
Buku Teks SO