edited by Edwin J. Thomas
Free Press, 1967
Buku Teks
Williams, Malcolm, 1953-
Routledge, 2000
Buku Teks
Bierstedt, Robert
McGraw-Hill, 1964
Buku Teks
Institute of Social Science, University of Tokyo,
Majalah, Jurnal, Buletin
Korean Social Science Research Council, 2003
Majalah, Jurnal, Buletin