Gill, R. W. (1973). The Thames and Hudson : manual of rendering with: Pen and ink. Thames and Hudson.
Cita Chicago (17th ed.)Gill, Robert W. The Thames and Hudson : Manual of Rendering with: Pen and Ink. London: Thames and Hudson, 1973.
Cita MLA (9th ed.)Gill, Robert W. The Thames and Hudson : Manual of Rendering with: Pen and Ink. Thames and Hudson, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.