1. https://gijoe.fandom.com/wiki/Sink_the_Montana!

From Joepedia, the definitive fan site for everything Joe, the episode summary.

2. https://www.history.navy.mil/our-collections/photography/us-navy-ships/battleships/montana-class-bb-67-71.html

Naval History and Heritage Command's website for the Montana-class battleships.

3. https://www.history.navy.mil/browse-by-topic/ships/ships-of-sail/uss-constitution-americas-ship-of-state.html

Naval History and Heritage Command's website for the USS Constitution