Cita APA (7th ed.)
Ball, D. A., & McCulloch, W. H. (1989). International business: Introduction and essentials (3rd ed.). Irwin.
Cita Chicago (17th ed.)
Ball, Donald A., i Wendell H. McCulloch. International Business: Introduction and Essentials. 3rd ed. Homewood, Illinois: Irwin, 1989.
Cita MLA (9th ed.)
Ball, Donald A., i Wendell H. McCulloch. International Business: Introduction and Essentials. 3rd ed. Irwin, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.