APA-referens (7:e uppl.)

Van Wyk, H. (1997). Painting flowers: The Van Wyk way. Art Instruction Associates.

Chicago-referens (17:e uppl.)

Van Wyk, Helen. Painting Flowers: The Van Wyk Way. Rockport, Mass: Art Instruction Associates, 1997.

MLA-referens (9:e uppl.)

Van Wyk, Helen. Painting Flowers: The Van Wyk Way. Art Instruction Associates, 1997.