Berridge, G. R, author
Palgrave Macmillan, 2015
Buku Teks
Hudson, Valerie M., 1958-, author
Rowman and Littlefield, 2014
Buku Teks
Beitz, Charles R
Princeton University Press, 1979
Buku Teks
Williams, Howard
St.Maitin's Press, 1996
Buku Teks
Berridge, G. R, author
Berridge, 2005
Buku Teks