Grasskamp, W. (2009). The Academic Painter. Problemi na izkustvoto.
Chicagoスタイル(17版)引用形式Grasskamp, Walter. "The Academic Painter." Problemi Na Izkustvoto 2009.
MLA(8版)引用形式Grasskamp, Walter. "The Academic Painter." Problemi Na Izkustvoto, 2009.
警告: この引用は必ずしも正確ではありません.