Gregory, R. L. (1994). Eye and brain: The psychology of seeing (4th ed.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Gregory, R. L. Eye and Brain: The Psychology of Seeing. 4th ed. Oxford: Oxford University Press, 1994.
Lua MLA (9ú heag.)Gregory, R. L. Eye and Brain: The Psychology of Seeing. 4th ed. Oxford University Press, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.