Helveston, E. M. (1985). Atlas of Strabismus Surgery (3 ed.). The C. V. Mosby Company.
Lua i Stíl Chicago (17ú heag.)Helveston, Eugene M. Atlas of Strabismus Surgery. 3 ed. Toronto: The C. V. Mosby Company, 1985.
Lua MLA (9ú heag.)Helveston, Eugene M. Atlas of Strabismus Surgery. 3 ed. The C. V. Mosby Company, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.