Gaya APA

Standards, T, A, C, Z, F, O. (2006). American national standard : for ophthalmics prescription ophthlmic lenses recomendation . Virginia: Optical Laboratories Association.

Gaya MLA

Standards, The, Accredited, Committee, Z80, For, Ophthalmic. "American national standard : for ophthalmics prescription ophthlmic lenses recomendation". Virginia: Optical Laboratories Association, 2006. Text.