Johnston, W. R. (2005). The essence of line: French drawings from Ingres to Degas.
Chicago-Zitierstil (17. Ausg.)Johnston, William R. The Essence of Line: French Drawings from Ingres to Degas. Baltimore, 2005.
MLA-Zitierstil (8. Ausg.)Johnston, William R. The Essence of Line: French Drawings from Ingres to Degas. 2005.
警告：這些引文格式不一定是100％准確.