Central Pacific Hurricane Center. Hurricane John Preliminary Report. NOAA. 2004 [2015-06-10]. (原始内容存档于2015-04-17). (页面存档备份,存于互联网档案馆) (Note that this report does not reflect changes made in post-season analysis.)
Central Pacific Hurricane Center. Hurricane John Preliminary Report. NOAA. 2004 [2015-06-10]. (原始内容存档于2015-04-17). (页面存档备份,存于互联网档案馆) (Note that this report does not reflect changes made in post-season analysis.)