APA استشهاد

Kirchner, W. (1968). Middle ages [375-1492]. Barnes & Noble Books.

استشهاد بنمط شيكاغو

Kirchner, Walther. Middle Ages [375-1492]. New York: Barnes & Noble Books, 1968.

MLA استشهاد

Kirchner, Walther. Middle Ages [375-1492]. Barnes & Noble Books, 1968.