Hudson, R. A.
Cambridge , 1980
Buku Teks
Southeast Asia Program, Cornell University, 1999
Buku Teks
Russell, Bertrand, 1872-1970
George Allen and Unwin, 1957
Buku Teks
Russel, Bertrand
Routledge, 1948
Buku Teks
edited by Oscar Uribe-Villegas
Mouton, 1977
Buku Teks