Yamada, Kuniaki (1994). "Uesugi Akisada" 上杉顕定. 朝日日本歴史人物事典 (Asahi Nihon rekishi jinbutsu jiten; Asahi encyclopedia of historic figures in the history of Japan) (in Japanese). Japan: The Asahi Shimbun Company. Retrieved 2022-09-22 – via Kotobank. Year of death: 永正7.6.20 (1510.7.25)
