Davis, Diane E.
Cambridge University Press, 2004
Buku Teks
Mills, C. Wright
Oxford University Press, 1951
Buku Teks SO
Lewis, Roy
Penguin Books, 1949
Buku Teks SO
Sweezy, Paul M. (Paul Marlor), 1910-2004
Augustus M. Kelley, 1951
Buku Teks
editors, Harry M. Flechtner, Ronald A. Brand, Mark S. Walter
Oxford University Press, 2008
Buku Teks