Olvier Zunz [and others], editor
Russel Sage Foundation, 2001
Buku Teks
Davis, Diane E., author
Cambridge University Press, 2004
Buku Teks
Lewis, Roy
Penguin Books, 1949
Buku Teks
Mills, C. Wright, author
Oxford University Press, 1951
Buku Teks
Sweezy, Paul M. (Paul Marlor), 1910-2004, author
Augustus M. Kelley, 1951
Buku Teks