Van Wyk, H. (1997). Painting flowers: The Van Wyk way. Art Instruction Associates.
芝加哥风格引文Van Wyk, Helen. Painting Flowers: The Van Wyk Way. Rockport, Mass: Art Instruction Associates, 1997.
MLA引文Van Wyk, Helen. Painting Flowers: The Van Wyk Way. Art Instruction Associates, 1997.
警告：这些引文格式不一定是100％准确.