History of Qi of the Southern Dynasties, seventh of the 24 dynastic histories 二十四史[Èr shí sì Shǐ], compiled by Xiao Zixian 蕭子顯|萧子显[Xiāo Zǐ xiǎn] in 537 during Liang of the Southern Dynasties 南朝梁[Nán cháo Liáng], 59 scrolls
usually 南齊書|南齐书[Nán Qí shū] to distinguish from Northern Qi