Sornarajah, M., author
Cambridge University Press, 2012
Buku Teks
Ralph H. Folsom, Michael Wallace Gordon, Michael P. Van Alstine, Michael D. Ramsey.
West Academic Publishing, 2015
Buku Teks
Sornarajah, M., author
Cambridge University Press, 1994
Buku Teks
Magdoff, Harry
New York, N.Y. Monthly Review Press c.1969,
Buku Teks
edited by Sergio Diaz-Brizuets and Sidney Weintraub
Westview Press , 1991
Buku Teks