Rottger, E. (1963). Creative drawing: Point and line. Reinhold.
Chicagoスタイル(17版)引用形式Rottger, Ernest. Creative Drawing: Point and Line. New York: Reinhold, 1963.
MLA(9版)引用形式Rottger, Ernest. Creative Drawing: Point and Line. Reinhold, 1963.
警告: この引用は必ずしも正確ではありません.