Smith, R. (1995). An Introduction to perspective. Dorling Kindersley.
Lua i Stíl Chicago (17ú heag.)Smith, Ray. An Introduction to Perspective. Dorling Kindersley, 1995.
Lua MLA (8ú heag.)Smith, Ray. An Introduction to Perspective. Dorling Kindersley, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.