(原始内容存档于2021-04-10) (英国英语). Simpson, George. Harry Potter fan FURY as JK Rowling sells £6 eBooks that are free online. Express.co.uk. 2016-09-08 [2019-10-05]
ISBN 9780123248015. Gill, Howard S.; Renaud, Claude B.; Chapleau, François; Mayden, Richard L.; Potter, Ian C.; Douglas, M. E. Phylogeny of Living Parasitic Lampreys
1-889963-57-7 (pbk.). Kari, James and Ben A. Potter. (2010). The Dene–Yeniseian Connection, ed. by J. Kari and B. Potter, 1–24. Anthropological Papers of the