Keith, Agnes Newton
Land below the wind / by Agnes Newton Keith
Little, Brown and Company, 1939
 Buku Teks SO
Towards a better management of Malacca and Singapore straits
 Artikel Jurnal
Joint Development zone : An alternative solution in solving the ambalat case between Indonesia and Malaysia
 Artikel Jurnal
Hanna, Williard A.
The formation of Malaysia: new factor in world politics / by Williard A. Hanna
American University Field Staff, 1964
 Buku Teks SO
Ryan, N.J
The Making of modern Malaysia and Singapore
Oxford University Press, 1970
 Buku Teks