APA (7e ed.) Bronvermelding

Ball, D. A., & McCulloch, W. H. (1990). International business: Introduction and essentials (4th ed.). BPI/Irwin.

Chicago (17e ed.) Bronvermelding

Ball, Donald A., en Wendell H. McCulloch. International Business: Introduction and Essentials. 4th ed. Homewood, IL: BPI/Irwin, 1990.

MLA (9e ed.) Bronvermelding

Ball, Donald A., en Wendell H. McCulloch. International Business: Introduction and Essentials. 4th ed. BPI/Irwin, 1990.