Não informado. Western journal of surgery, obstetrics and gynecology. Seattle Surgical Society.
Chicago-referens (17:e uppl.)Não informado. Western Journal of Surgery, Obstetrics and Gynecology. Portland, Ore: Seattle Surgical Society.
MLA-referens (8:e uppl.)Não informado. Western Journal of Surgery, Obstetrics and Gynecology. Seattle Surgical Society.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.