Robequain, Charles, 1897-1963
Longmans, 1959
Buku Teks
Mackinnon, John Ramsay
[publisher not identified], [date of publication not identified]
Buku Teks
Robinson, Danielm
Lonely Publications Pty Ltd, 2011
Buku Referensi
Ali, Muhamad
Edinburgh University Press, 2016
eBooks
Omar, Asmah binti Haji
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1963
UI - Skripsi Membership