↑Bell، Blake؛ Vassallo، Michael J. (2013). The Secret History of Marvel Comics: Jack Kirby and the Moonlighting Artists at Martin Goodman's Empire. Fantagraphics Books. p. 299. ISBN1-60699-552-9.
↑Writer-artist Bill Everett's Sub-Mariner had actually been created for an undistributed movie-theater giveaway comic, Motion Picture Funnies Weekly earlier that year, with the previously unseen, eight-page original story expanded by four pages for Marvel Comics #1.
↑Goulart، Ron (2000). Comic book culture: an illustrated history. Collectors Press, Inc. p. 173. ISBN978-1-888054-38-5.. Preceding Captain America were MLJ Comics' the Shield (Archie Comics) and Fawcett Comics' Minute-Man.
↑"Marvel : Timely Publications (Indicia Publisher)"Archived 2012-01-28 at the Wayback Machine. at the Grand Comics Database. "This is the original business name under which Martin Goodman began publishing comics in 1939. It was used on all issues up to and including those cover-dated March 1941 or Winter 1940–1941, spanning the period from Marvel Mystery Comics #1 to Captain America Comics #1. It was replaced by Timely Comics, Inc. starting with all issues cover-dated April 1941 or Spring 1941."