《三国志·魏书·后妃传》
郭德和郭建都担任镇护将军，都被封为列侯，执掌京城的警卫工作。
德及建俱为镇护将军，皆封列侯，并掌宿卫。
Guo De and Guo Jian both held the post of Colonel of the Capital's Garrison. Both were granted marquistates and were responsible for the security of the capital.