Gaya APA

ophthalmology, A, A, O. et al (1989). Pediatric Ophthalmology and Strabismus Sec. 6 . [s.i.]: american academy of ophthalmology.

Gaya MLA

ophthalmology, American, Academy, Of. et al. "Pediatric Ophthalmology and Strabismus Sec. 6 ". [s.i.]: american academy of ophthalmology, 1989. Text.