Rasy, Douc
Printed In Great Britain, 1974
Buku Teks
Liow, Joseph Chinyong, author
Routledge, 2008
Buku Teks
Westview Press , 1984
Buku Teks
Cowen, Zelman, author
North-Western University Press, 1965
Buku Teks
Laitin, David D., author
The University of Chicago Press, 1986
Buku Teks