Cita APA (7a ed.)

Johnson, C., & Barral, I. (2006). Intelligent business: Skills book : upper intermediate business english. Longman.

Cita Chicago Style (17a ed.)

Johnson, Christine, y Irene Barral. Intelligent Business: Skills Book : Upper Intermediate Business English. London: Longman, 2006.

Cita MLA (9a ed.)

Johnson, Christine, y Irene Barral. Intelligent Business: Skills Book : Upper Intermediate Business English. Longman, 2006.