Gaya APA

ophthalmology, A, A, O. et al (1990). Retina and Vitreous Sec. 4 . [s.i.]: american academy of ophthalmology.

Gaya MLA

ophthalmology, American, Academy, Of. et al. "Retina and Vitreous Sec. 4 ". [s.i.]: american academy of ophthalmology, 1990. Text.