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อ้างอิง
Caligula. (2022, January 20). Encyclopedia Britannica. Retrieved July 4, 2022, from https://www.britannica.com/biography/Caligula-Roman-emperor

Campbell, D. B. (2014, April 23). Caligula’s capers on the North Sea coast: Did the Emperor Caligula plan to invade Britain? Academia. Retrieved July 4, 2022, from https://www.academia.edu/2469929/Caligulas_capers_on_the_North_Sea_coast_Did_the_Emperor_Caligula_plan_to_invade_Britain

Cohen, J. (2018, August 30). 7 Things You May Not Know Abo...