McAllister, James Alexander, author
McGill-Queens University Press, 1984
Buku Teks
Sweezy, Paul M. (Paul Marlor), 1910-2004, author
McGraw-Hill, 1949
Buku Teks
Dimock, Marshall Edward, author
Henry Holt , 1953
Buku Teks
Banfield, Edward C., author
Free Press, 1951
Buku Teks
Morton, W.L.
University of Toronto Press, 1979
Buku Teks