《资治通鉴·隋纪·隋纪三》
杨素推荐瓜州刺史长安人刘方，认为他有将帅的谋略，文帝下诏任命刘方为交州道行军总管，率领二十七营军队进发。
杨素荐瓜州刺史长安刘方有将帅之略，诏以方为交州道行军总管，统二十七营而进。
Yang Su recommended Liu Fang, a history of Guazhou Chang'an people, believing that he has the strategy of a general. Emperor Wenxia ordered Liu Fang to be the chief commander of the Jiaozhou Road March, leading twenty-seven battalions into battle.