Gill, R. W. (1984). The Thames and Hudson manual of rendering with pen and ink (Rev. and enl. ed.). Thames and Hudson.
Lua i Stíl Chicago (17ú heag.)Gill, Robert W. The Thames and Hudson Manual of Rendering with Pen and Ink. Rev. and enl. ed. London ; New York: Thames and Hudson, 1984.
Lua MLA (8ú heag.)Gill, Robert W. The Thames and Hudson Manual of Rendering with Pen and Ink. Rev. and enl. ed. Thames and Hudson, 1984.
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