London : Sage, 1990.

Internet Archive >> None

Jackson, J. A. (John Archer), 1929-

London : Cambridge University Press, 1970.

Internet Archive >> None

Connor, Richard A.

New York : Wiley, c1985.

Internet Archive >> None

Kotler, Philip

Englewood Cliffs, NJ : Prentice-Hall, c1984.

Internet Archive >> None

Wheatley, Edward W., 1936-

Englewood Cliffs, N.J. : Prentice-Hall, c1983.

Internet Archive >> None

Nieuwenhuysen, J. P.

Carlton, Vic. : Melbourne University Press ; Beaverton, OR : International Scholarly Book Services [distributor], 1982.

Internet Archive >> None

Perkin, Harold James

London ; New York : Routledge, c1996.

Internet Archive >> None

Moore, Wilbert Ellis

New York, Russell Sage Foundation [1970]

Internet Archive >> None

Abbott, Andrew Delano

Chicago : University of Chicago Press, c1988.

Internet Archive >> None

Becher, Tony

New Brunswick, N.J. : Transaction Publishers, c1999.

Internet Archive >> None