World Book – Columbus, ChristopherArchive.is的存檔,存档日期2012-12-03 "Columbus, Christopher". World Book Store has the encyclopedia, dictionary, atlas, homework help, study aids, and curriculum guides. 2010
Herbst, Philip The Color of Words: An Encyclopaedic Dictionary of Ethnic Bias in the United States Intercultural Press Inc (31 December 1997) ISBN 978-1-877864-97-1 p.116 [1] (页面存档备份,存于互联网档案馆)
Wilton, David; Brunetti, Ivan Word myths: debunking linguistic urban legends Oxford University Press USA (13 January 2005) ISBN 978-0-19-517284-3 pp. 164–165 [2] (页面存档备份,存于互联网档案馆)
World Book – Columbus, ChristopherArchive.is的存檔,存档日期2012-12-03 "Columbus, Christopher". World Book Store has the encyclopedia, dictionary, atlas, homework help, study aids, and curriculum guides. 2010
Herbst, Philip The Color of Words: An Encyclopaedic Dictionary of Ethnic Bias in the United States Intercultural Press Inc (31 December 1997) ISBN 978-1-877864-97-1 p.116 [1] (页面存档备份,存于互联网档案馆)
Wilton, David; Brunetti, Ivan Word myths: debunking linguistic urban legends Oxford University Press USA (13 January 2005) ISBN 978-0-19-517284-3 pp. 164–165 [2] (页面存档备份,存于互联网档案馆)