APA استشهاد

McConnel, C. R. (1969). Economics; Principles, Problems and Policies (4th ed.). McGraw-Hill.

استشهاد بنمط شيكاغو

McConnel, Campbell R. Economics; Principles, Problems and Policies. 4th ed. New York: McGraw-Hill, 1969.

MLA استشهاد

McConnel, Campbell R. Economics; Principles, Problems and Policies. 4th ed. McGraw-Hill, 1969.