APA način citiranja

Shafik, A., Shafik, I., El Sibai, O., & Shafik, A. A. (2007). On the pathogenesis of penile venous leakage: Role of the tunica albuginea. BioMed Central.

Čikaški stil citiranja

Shafik, Ahmed, Ismail Shafik, Olfat El Sibai, i Ali A. Shafik. On the Pathogenesis of Penile Venous Leakage: Role of the Tunica Albuginea. BioMed Central, 2007.

MLA način citiranja

Shafik, Ahmed, Ismail Shafik, Olfat El Sibai, i Ali A. Shafik. On the Pathogenesis of Penile Venous Leakage: Role of the Tunica Albuginea. BioMed Central, 2007.