《资治通鉴·唐纪·唐纪五》
当初，洛阳平定后，徐圆朗请求投降，唐授予他兖州总管，封鲁郡公。
初，洛阳既平，徐圆朗请降，拜兗州总管，封鲁郡公。
After the pacification of Luoyang, Xu Yuanlang asked to surrender, and Tang granted him the post of governor of Yanzhou and the title of Duke of Lugong.