APA استشهاد

Schaffer, R., & Earle, B. A. (1999). International Business Law and its environment (4.). West Educational Publishing.

استشهاد بنمط شيكاغو

Schaffer, Richard, و Beverley Agusti Earle. International Business Law and Its Environment. 4. Ohio: West Educational Publishing, 1999.

MLA استشهاد

Schaffer, Richard, و Beverley Agusti Earle. International Business Law and Its Environment. 4. West Educational Publishing, 1999.