Sydney Hicks,Smith & Sons Pty LTD 1973,
Buku Referensi
Kabul Aripin
Permata, 1960
Buku Teks
Fadilla Dwianti Putri, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2014
UI - Skripsi (Membership)
edited by Adam Ledgeway and Ian Roberts
Cambridge University Press, 2017
Buku Teks
Dolan, Josephine A., author
WB Saunder comp , 1983
Buku Teks