APA (7e ed.) Bronvermelding

Ball, D. A., & McCulloch, W. H. (1993). International business: Introduction and essentials (5th ed.). Irwin.

Chicago (17e ed.) Bronvermelding

Ball, Donald A., en Wendell H. McCulloch. International Business: Introduction and Essentials. 5th ed. Homewood, IL: Irwin, 1993.

MLA (8e ed.) Bronvermelding

Ball, Donald A., en Wendell H. McCulloch. International Business: Introduction and Essentials. 5th ed. Irwin, 1993.