Roff, William R.
University of Malaysia Press, 1967
Buku Teks
McQueen, Humphrey, author
Penguin books, 1970
Buku Teks
Ayer, A. J. (Alfred Jules), 1910-1989, author
Freeman, Coope, 1968
Buku Teks
Durham, William H.
Stanford University Press, 1979
Buku Teks
Vernadsky, George
At The Clarendon Press, 1959
Buku Teks