Wolff, E. Psthology of the eye (2. ed.).
Lua i Stíl Chicago (17ú heag.)Wolff, Eugene. Psthology of the Eye. 2. ed.
Lua MLA (8ú heag.)Wolff, Eugene. Psthology of the Eye. 2. ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.