Gill, R. W. (1990). The Thames and Hudson manual of rendering with pen and ink (Rev. and enl. ed.). New York: Thames and Hudson.
Παραπομπή Chicago StyleGill, Robert W. The Thames and Hudson Manual of Rendering With Pen and Ink. Rev. and enl. ed. New York: Thames and Hudson, 1990.
Παραπομπή MLAGill, Robert W. The Thames and Hudson Manual of Rendering With Pen and Ink. Rev. and enl. ed. New York: Thames and Hudson, 1990.
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