《太平广记·卷二百零九·书四》
书有三体：一叫铭石书体，是最妙的。二叫章、程书体。三叫狎书。
有三体，一曰铭石之书，最妙者也；二曰章程书；三曰狎书。
Calligraphy has three styles: the first is the "铭石" style, which is the most exquisite, the second is the "章程" style, and the third is the "狎" style.