《北史·本记·卷二》
二十六日，以去世的南秦王之世子杨保宗为征南大将军、秦州牧、武都王，镇守上圭阝。
庚寅，以故南秦王世子杨保宗为征南大将军、秦州牧、武都王，镇上邽。
On the twenty-sixth, the deceased King of Nanqin's crown prince, Yang Baizong, was posthumously granted the titles of General Who Conquers the South, Governor of Qinzhou, and Prince of Wudou, and was stationed in Shanggu.