Eva, P. R., & Witcher, J. P. (2010). Voughan & Asbury. Oftamologi Umum. EGC.
Cita Chicago (17th ed.)Eva, Paul Riordan, i John P. Witcher. Voughan & Asbury. Oftamologi Umum. EGC, 2010.
Cita MLA (9th ed.)Eva, Paul Riordan, i John P. Witcher. Voughan & Asbury. Oftamologi Umum. EGC, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.