APA-viite (7. p.)

Clarke, D., & Macfarlane, M. (2009). Focus on Success: Ausgabe Technik Workbook. Cornelsen.

Chicago-viite (17. p.)

Clarke, David, ja Michael Macfarlane. Focus on Success: Ausgabe Technik Workbook. Berlin: Cornelsen, 2009.

MLA-viite (8. p.)

Clarke, David, ja Michael Macfarlane. Focus on Success: Ausgabe Technik Workbook. Cornelsen, 2009.