Gaya APA

Ridle, J, H. (1981). Gynecologic Surgery: Erros, Safe Guards, Salvage (2nd. ed). Baltimore: Lippincott Williams \r Wilkins.

Gaya MLA

Ridle, John, H. "Gynecologic Surgery: Erros, Safe Guards, Salvage". 2nd. ed Baltimore: Lippincott Williams \r Wilkins, 1981. print.