APA استشهاد

Roy, P. N. (1986). International trade: Theory and practice. Wiley castern.

استشهاد بنمط شيكاغو

Roy, P. N. International Trade: Theory and Practice. New Delhi: Wiley castern, 1986.

MLA استشهاد

Roy, P. N. International Trade: Theory and Practice. Wiley castern, 1986.