《旧唐书·列传·卷一百一十二》
先前，李正己窃据青、郓十二州，传袭四世，达五十年，民俗顽冥桀骜，不知礼法教化。
初，李正己盗有青、郓十二州，传袭四世，垂五十年，人俗顽骜，不知礼教。
Previously, Li Zhengji had seized Qingzhou and Yuncheng, Zhou for four generations, lasting for 50 years. The people’s customs were stubborn and unruly, and they did not know etiquette and education.