GILL ROBERT W. (1973). RENDERING WITH PEN+INK. THAMES & HUDSON.
Lua i Stíl Chicago (17ú heag.)GILL ROBERT W. RENDERING WITH PEN+INK. LONDON: THAMES & HUDSON, 1973.
Lua MLA (9ú heag.)GILL ROBERT W. RENDERING WITH PEN+INK. THAMES & HUDSON, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.