APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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