Não informado. (2018). The Ophthalmic Year Book. The Herrick Book and Stationery Company.
Chicago-Zitierstil (17. Ausg.)Não informado. The Ophthalmic Year Book. Denver, Colo: The Herrick Book and Stationery Company, 2018.
MLA-Zitierstil (8. Ausg.)Não informado. The Ophthalmic Year Book. The Herrick Book and Stationery Company, 2018.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.