Cita APA (7a ed.)

Johnson, C., & Barral, I. (2006). Intelligent business: Skills book : upper intermediate business english [CD-ROM]. Longman.

Cita Chicago Style (17a ed.)

Johnson, Christine, y Irene Barral. Intelligent Business: Skills Book : Upper Intermediate Business English [CD-ROM]. London: Longman, 2006.

Cita MLA (9a ed.)

Johnson, Christine, y Irene Barral. Intelligent Business: Skills Book : Upper Intermediate Business English [CD-ROM]. Longman, 2006.