(en) « Subway Opening To-day With Simple Ceremony – Exercises at One O'Clock – Public to be Admitted at Seven – John Hay May Be Present – Expected to Represent the Federal Government – President Roosevelt Sends Letter of Regret », The New York Times, (ISSN0362-4331, lire en ligne [PDF], consulté le ).
(en) « Subway Opening To-day With Simple Ceremony – Exercises at One O'Clock – Public to be Admitted at Seven – John Hay May Be Present – Expected to Represent the Federal Government – President Roosevelt Sends Letter of Regret », The New York Times, (ISSN0362-4331, lire en ligne [PDF], consulté le ).