Citazione Stile APA (7a Edizione)

Clarke, D., & Macfarlane, M. (2007). Focus on Business Workbook (New edition.). Cornelsen.

Citazione stile Chigago Style (17a edizione)

Clarke, David, e Michael Macfarlane. Focus on Business Workbook. New edition. Berlin: Cornelsen, 2007.

Citatione MLA (8a ed.)

Clarke, David, e Michael Macfarlane. Focus on Business Workbook. New edition. Cornelsen, 2007.