APA استشهاد

Valentine,Frederick.A. (1964). Convex Sets (1964.). McGraw-Hill Book Company.

استشهاد بنمط شيكاغو

Valentine,Frederick.A. Convex Sets. 1964. New York: McGraw-Hill Book Company, 1964.

MLA استشهاد

Valentine,Frederick.A. Convex Sets. 1964. McGraw-Hill Book Company, 1964.