Charlesworth, Harold Karr, author
The New Nusantara, 1959
Buku Teks
Woodworth, George Walter, author
McGraw-Hill, 1950
Buku Teks
Fry, Maxwell J., author
Routledge, 1997
Buku Teks
edited by Benyamin Haggott Beckhart
Columbia Universary Press, 1954, 1956
Buku Teks
Thorne, W.J., author
Oxford University Press , 1948
Buku Teks