APA استشهاد

Zacour, N. P. (1969). An introduction to medieval institutions. New York: St. Martin's Press.

استشهاد بنمط شيكاغو

Zacour, Norman P.. An Introduction to Medieval Institutions. New York: St. Martin's Press, 1969.

MLA استشهاد

Zacour, Norman P.. An Introduction to Medieval Institutions. New York: St. Martin's Press, 1969.