Oxford University Press. 2010 [1 June 2013]. (原始内容存档于2016-08-20). PaulShaffer on Letterman, March 20, 1984, [2021-06-10], (原始内容存档于2021-06-10) (中文(中国大陆))
龟科(水龟科)、地龟科、陆龟科及已绝灭的海古龟科等:99。 Rhodin, Anders G.J.; Paul van Dijk, Peter; Inverson, John B.; Shaffer, H. Bradley. Turtles of the World 2010 Update: Annotated
2011,第000.171-176頁 參考書目 Rhodin, Anders G.J.; van Dijk, Peter Paul; Inverson, John B.; Shaffer, H. Bradley; Roger, Bour. Turtles of the world, 2011 update: