Friedenberg, Jay, author
Sage, 2006
Buku Teks
Robert Cummins
Blackwell Publishing, 2000
Buku Teks
Cain, M.J., author
Polity, 2016
Buku Teks
Sun, Ron, author
Oxford University Press, 2016
eBooks
edited by John D. Greenwood
Cambridge University Press , 1991
Buku Teks