APA

Ball D., . (1999). The Challenge of Global Competition. Boston: Irwin/McGraw-Hill.

Chicago

Ball D.A, . 1999. The Challenge of Global Competition. Boston: Irwin/McGraw-Hill.

Harvard

Ball D., . (1999). The Challenge of Global Competition. Boston: Irwin/McGraw-Hill.

MLA

Ball D.A, . The Challenge of Global Competition. Boston: Irwin/McGraw-Hill. 1999.