Fry, G. A. (1955). Blur of the retinal image. Ohio State University Press.
Lua i Stíl Chicago (17ú heag.)Fry, Glenn A. Blur of the Retinal Image. Columbus: Ohio State University Press, 1955.
Lua MLA (9ú heag.)Fry, Glenn A. Blur of the Retinal Image. Ohio State University Press, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.