Howard, R. (1992). The illustrators Bible: The complete sourcebook of tips, tricks, and time-saving techniques in oil, alkyd, acrylic, gouache, casein, watercolor, dyes, inks, airbrush, scratchboard, pastel, colored pencil, and mixed media. Watson-Guptill.
Παραπομπή σε μορφή Chicago (17η εκδ.)Howard, Rob. The Illustrators Bible: The Complete Sourcebook of Tips, Tricks, and Time-saving Techniques in Oil, Alkyd, Acrylic, Gouache, Casein, Watercolor, Dyes, Inks, Airbrush, Scratchboard, Pastel, Colored Pencil, and Mixed Media. New York: Watson-Guptill, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)Howard, Rob. The Illustrators Bible: The Complete Sourcebook of Tips, Tricks, and Time-saving Techniques in Oil, Alkyd, Acrylic, Gouache, Casein, Watercolor, Dyes, Inks, Airbrush, Scratchboard, Pastel, Colored Pencil, and Mixed Media. Watson-Guptill, 1992.