Não informado. (1984). World leisure & recreation. World Leisure and Recreation Association.
Style de citation Chicago (17e éd.)Não informado. World Leisure & Recreation. New York: World Leisure and Recreation Association, 1984.
Style de citation MLA (8e éd.)Não informado. World Leisure & Recreation. World Leisure and Recreation Association, 1984.
Attention : ces citations peuvent ne pas être correctes à 100%.