Eva, P. R., & Witcher, J. P. (2010). Voughan & Asbury. Oftamologi Umum. EGC.
Chicago-čujuhus (17. p.)Eva, Paul Riordan, juo John P. Witcher. Voughan & Asbury. Oftamologi Umum. EGC, 2010.
MLA-čujuhus (9. p.)Eva, Paul Riordan, juo John P. Witcher. Voughan & Asbury. Oftamologi Umum. EGC, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.