APA-ийн эшлэл(7 дахь хэвлэлт)

Cambridge University Press. (2026). Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests (Fully Updated Version.). Cambridge University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Cambridge University Press. Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests. Fully Updated Version. Cambridge: Cambridge University Press, 2026.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Cambridge University Press. Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests. Fully Updated Version. Cambridge University Press, 2026.