APA استشهاد

Samuelson Paul A. (1964). Economics: An introductory analysis/6e (6th ed.). Mcgraw Hill.

استشهاد بنمط شيكاغو

Samuelson Paul A. Economics: An Introductory Analysis/6e. 6th ed. New York: Mcgraw Hill, 1964.

MLA استشهاد

Samuelson Paul A. Economics: An Introductory Analysis/6e. 6th ed. Mcgraw Hill, 1964.