Cohn, P. M. (1971). Free Rings and Their Relations. London: Academic Press.
استشهاد بنمط شيكاغوCohn, P. M. Free Rings and Their Relations. London: Academic Press, 1971.
MLA استشهادCohn, P. M. Free Rings and Their Relations. London: Academic Press, 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.