Polanka, S. (2011). No shelf required: E-books in libraries. Chicago: American Library Association.
استشهاد بنمط شيكاغوPolanka, Sue. No Shelf Required: E-books in Libraries. Chicago: American Library Association, 2011.
MLA استشهادPolanka, Sue. No Shelf Required: E-books in Libraries. Chicago: American Library Association, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.