Não informado. (1984). World leisure & recreation. World Leisure and Recreation Association.
Chicago-viite (17. p.)Não informado. World Leisure & Recreation. New York: World Leisure and Recreation Association, 1984.
MLA-viite (8. p.)Não informado. World Leisure & Recreation. World Leisure and Recreation Association, 1984.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.