(原始内容存档于2011-07-20). Christensen, Bev. Prince George: Rivers, Railways and Timber. Burlington: Windsor. 1989. ISBN 0-89781-266-2. Downs, Art. Paddlewheels on the Frontier
(原始内容存档于2021-05-13). The launch of LTC's smart card technology is underway. London Transit Commission. [10 February 2016]. (原始内容存档于2016-02-12). La carte Opus à Lévis