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«Recognized Sports». olympic.org – Official Website of the Olympic Movement p. "Sports" section. Lausanne, Switzerland: International Olympic Committee, 2009. Arxivat de l'original el 2009-07-05. [Consulta: 1r juny 2009].
«WCBS» p. Homepage and very name of organization. Lausanne: World Confederation of Billiards Sports, 2005. Arxivat de l'original el 2009-02-06. [Consulta: 1r juny 2009].