Cambridge University Press. (2026). Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests (Fully Updated Version.). Cambridge University Press.
Citação norma ChicagoCambridge University Press. Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests. Fully Updated Version. Cambridge: Cambridge University Press, 2026.
Citação norma MLACambridge University Press. Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests. Fully Updated Version. Cambridge University Press, 2026.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.