Cooper, H. (2001). Still Against Himself: Clyfford Still in Retrospect. Artforum.
Chicago-Zitierstil (17. Ausg.)Cooper, Harry. "Still Against Himself: Clyfford Still in Retrospect." Artforum 2001.
MLA-Zitierstil (8. Ausg.)Cooper, Harry. "Still Against Himself: Clyfford Still in Retrospect." Artforum, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.