Gaya APA

Riordan-Eva, P., Cunninhham, E, T. (2011). Vaughan & Asbury's General Ophthamology (18). : Mc Graw Hill.

Gaya MLA

Riordan-Eva, Paul., Cunninhham, Emmett, T,. "Vaughan & Asbury's General Ophthamology". 18 : Mc Graw Hill, 2011. Text.