Barnes M P & Simon J L. (1969). Patterns in the use of books in large research libraries. University of Chicago Press.
استشهاد بنمط شيكاغوBarnes M P و Simon J L. Patterns in the Use of Books in Large Research Libraries. Chicago: University of Chicago Press, 1969.
MLA استشهادBarnes M P و Simon J L. Patterns in the Use of Books in Large Research Libraries. University of Chicago Press, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.