Van Wyk, H. (1997). Painting flowers: The Van Wyk way. Art Instruction Associates.
Chicagoスタイル(17版)引用形式Van Wyk, Helen. Painting Flowers: The Van Wyk Way. Rockport, Mass: Art Instruction Associates, 1997.
MLA(9版)引用形式Van Wyk, Helen. Painting Flowers: The Van Wyk Way. Art Instruction Associates, 1997.
警告: この引用は必ずしも正確ではありません.