《资治通鉴·唐纪·唐纪六十八》
唐振武节度使李国昌自恃有功，骄横恣肆，专杀朝廷任命的官吏。
振武节度使李国昌，恃功恣横，专杀长吏。
Li Guochang, military governor of Zhenwu, relied on his achievements and became arrogant and unrestrained. He arbitrarily killed officials dispatched by the imperial court.