^ abcThe Wei Shu (魏書) mentioned that Xun You died at the age of 58 (by East Asian age reckoning) in the 19th year of the Jian'an era (196-220) in the reign of Emperor Xian of Han. (魏書曰：時建安十九年，攸年五十八。計其年大彧六歲。) By calculation, Xun You's birth year should be around 157.
^de Crespigny, Rafe (2007). A biographical dictionary of Later Han to the Three Kingdoms (23–220 AD). Brill. p. 928. ISBN978-90-04-15605-0.