Cita APA (7a ed.)

Ball, D. A., & McCulloch, W. H. J. (1990). International business: Introduction and essentials (Fourth edition.). BPI/Richard D. Irwin, Inc.

Cita Chicago Style (17a ed.)

Ball, Donald A., y Wendell H. Jr McCulloch. International Business: Introduction and Essentials. Fourth edition. Homewood, Illinois: BPI/Richard D. Irwin, Inc, 1990.

Cita MLA (9a ed.)

Ball, Donald A., y Wendell H. Jr McCulloch. International Business: Introduction and Essentials. Fourth edition. BPI/Richard D. Irwin, Inc, 1990.