Davis, Diane E.
Cambridge University Press, 2004
Buku Teks
Lewis, Roy
Penguin Books, 1949
Buku Teks
Mills, C. Wright
Oxford University Press, 1951
Buku Teks
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