Pye, Lucian W., 1921-2008
Princeton University Press , 1956
Buku Teks
Emil Reza Razali
New York Barron's Educational Series 1970,
Buku Teks
Ratnam, K.J.
University of Malaya Press, 1965
Buku Teks SO
Winstedt, Richard, 1878-1966
Hutchinson University Library, [Date of publication not identified]
Buku Teks SO
Ratnam, K.J.
Kuala Lumpur University of Malaya Press 1967
Buku Teks