APA

Lee T. Y., Cheon Y. K., Choe W. H. & Shim C. S. (20120426). Direct cholangioscopy-based holmium laser lithotripsy of difficult bile duct stones by using an ultrathin upper endoscope without a separate biliary irrigating catheter. : Photomedicine and laser surgery.

Chicago

Lee Tae Yoon, Cheon Young Koog, Choe Won Hyeok and Shim Chan Sup. 20120426. Direct cholangioscopy-based holmium laser lithotripsy of difficult bile duct stones by using an ultrathin upper endoscope without a separate biliary irrigating catheter. : Photomedicine and laser surgery.

Harvard

Lee T. Y., Cheon Y. K., Choe W. H. and Shim C. S. (20120426). Direct cholangioscopy-based holmium laser lithotripsy of difficult bile duct stones by using an ultrathin upper endoscope without a separate biliary irrigating catheter. : Photomedicine and laser surgery.

MLA

Lee Tae Yoon, Cheon Young Koog, Choe Won Hyeok and Shim Chan Sup. Direct cholangioscopy-based holmium laser lithotripsy of difficult bile duct stones by using an ultrathin upper endoscope without a separate biliary irrigating catheter. : Photomedicine and laser surgery. 20120426.