《新五代史·列传·周家人传第八》
贞惠皇后刘氏，不知道她的家世，因为是周世宗微贱时娶的。周世宗任左监门卫将军时，得以封为彭城县君。
世宗三皇后。贞惠皇后刘氏，不知其世家，盖微时所娶也，世宗为左监门卫将军，得封彭城县君。
Empress Zhenhui Liu, her family background is unknown because she was married to Zhou Shizong when he was still in poverty. When Zhou Shizong was appointed the General of the Left Guard, she was conferred the title of Commandery Princess of Pengcheng.