Glasgow, Joshua, author
Routledge, 2009
Buku Teks
Kinloch, Graham C., author
McGraw-Hill , 1974
Buku Teks
Banton Michael, author
Tavistock Publications, 1969
Buku Teks
Berghe,Pirre Van Den
Basic Books Inc Publishers, 1970
Buku Teks
Rex, John
Oxford University Press, 1979
Buku Teks