Martin, J., Kirby, K., Vinall, A., & Gair, A. (1992). The encyclopedia of colored pencil techniques. Rockport Publishers.
Lua i Stíl Chicago (17ú heag.)Martin, Judy, Kate Kirby, Ashleigh Vinall, agus Angie Gair. The Encyclopedia of Colored Pencil Techniques. Rockport, Mass: Rockport Publishers, 1992.
Lua MLA (9ú heag.)Martin, Judy, et al. The Encyclopedia of Colored Pencil Techniques. Rockport Publishers, 1992.
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