APA-viite (7. p.)

Harrison, M. (2012). Complete IELTS: Bands 5-6.5 : Workbook with Answers. Cambridge University Press.

Chicago-viite (17. p.)

Harrison, Mark. Complete IELTS: Bands 5-6.5 : Workbook with Answers. Cambridge: Cambridge University Press, 2012.

MLA-viite (8. p.)

Harrison, Mark. Complete IELTS: Bands 5-6.5 : Workbook with Answers. Cambridge University Press, 2012.