Mallaby, George
Leo Cooper, 1972
Buku Teks
edited by Leslie Stephen, Sidney Lee
Oxford University Press, 1950
Buku Referensi
Rolt, L.T.C
Alan Sutton, 1994
Buku Teks
Comber, Leon, author
Institute of South East Asia Studies, 2015
eBooks
[T.t.] Unesco 1961
Buku Teks