APA استشهاد

Harrod, R. (1968). International trade theory in a developing world. Macmillan.

استشهاد بنمط شيكاغو

Harrod, Roy. International Trade Theory in a Developing World. London: Macmillan, 1968.

MLA استشهاد

Harrod, Roy. International Trade Theory in a Developing World. Macmillan, 1968.