Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (2018). The Ophthalmic Year Book. The Herrick Book and Stationery Company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. The Ophthalmic Year Book. Denver, Colo: The Herrick Book and Stationery Company, 2018.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. The Ophthalmic Year Book. The Herrick Book and Stationery Company, 2018.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.