APA-viite (7. p.)

Cambridge University Press. (2018). Cambridge IELTS 13 with Answers: Academic: Fully Update Version: Examination Papers From University Of Cambridge Esol Examination (Fully Updated Version.). Cambridge University Press.

Chicago-viite (17. p.)

Cambridge University Press. Cambridge IELTS 13 with Answers: Academic: Fully Update Version: Examination Papers From University Of Cambridge Esol Examination. Fully Updated Version. Cambridge: Cambridge University Press, 2018.

MLA-viite (9. p.)

Cambridge University Press. Cambridge IELTS 13 with Answers: Academic: Fully Update Version: Examination Papers From University Of Cambridge Esol Examination. Fully Updated Version. Cambridge University Press, 2018.