Howarth, W. (1925). A Set of Modified Jackson's Tubes and Instruments for Peroral Endoscopy.
استشهاد بنمط شيكاغوHowarth, Walter. A Set of Modified Jackson's Tubes and Instruments for Peroral Endoscopy. 1925.
MLA استشهادHowarth, Walter. A Set of Modified Jackson's Tubes and Instruments for Peroral Endoscopy. 1925.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.