Ehrlich, D., Anker, S., & Braddick, O. (1994). ON-AXIS AND OFF-AXIS REFRACTIONS OF INFANTS.
Lua i Stíl Chicago (17ú heag.)Ehrlich, D., S. Anker, agus O. Braddick. ON-AXIS AND OFF-AXIS REFRACTIONS OF INFANTS. 1994.
Lua MLA (9ú heag.)Ehrlich, D., et al. ON-AXIS AND OFF-AXIS REFRACTIONS OF INFANTS. 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.