[http://www.informaworld.com/smpp/content~content=a913133306&db=all]* John Robert Kelly, Geoffrey Godbey, "The Sociology of Leisure", Venture Pub., 1992, ISBN 0-910251-56-8.
[http://www.informaworld.com/smpp/content~content=a913133306&db=all]* John Robert Kelly, Geoffrey Godbey, "The Sociology of Leisure", Venture Pub., 1992, ISBN 0-910251-56-8.