Juan Islands Washington Visitors Bureau | Orcas Island | LopezIsland | Friday Harbor | San Juan Island. 2015-05-24 [2017-08-17]. (原始内容存档于2020-04-13) (英语)
the World. Retrieved 24 May 2014. Alofs; Liverpool; Taphorn; Bernard; and Lopez-Fernandez. Mind the (information) gap: the importance of exploration and