Askew, A. R., Ward, M., & Cowen, A. E. (1989). Early postoperative endoscopic sphincterotomy for retained common duct stones. Royal College of Surgeons of England.
استشهاد بنمط شيكاغوAskew, A. R., M. Ward, و A. E. Cowen. Early Postoperative Endoscopic Sphincterotomy for Retained Common Duct Stones. Royal College of Surgeons of England, 1989.
MLA استشهادAskew, A. R., M. Ward, و A. E. Cowen. Early Postoperative Endoscopic Sphincterotomy for Retained Common Duct Stones. Royal College of Surgeons of England, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.