APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

Clarke, David, Michael Macfarlane, en Steve Williams. Focus on Success: Ausgabe Soziales Workbook. Berlin: Cornelsen, 2009.

MLA (8e ed.) Bronvermelding

Clarke, David, et al. Focus on Success: Ausgabe Soziales Workbook. Cornelsen, 2009.