Cambridge University Press. (2026). Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests (Fully Updated Version.). Cambridge University Press.
Chicagoスタイル(17版)引用形式Cambridge University Press. Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests. Fully Updated Version. Cambridge: Cambridge University Press, 2026.
MLA(9版)引用形式Cambridge University Press. Cambridge IELTS 20 with Answers: Academic: Fully Update Version: Authentic Practice Tests. Fully Updated Version. Cambridge University Press, 2026.
警告: この引用は必ずしも正確ではありません.