APA aipamena

Lougheed, L. (2011). Ielts International English Languages Testing System. Nhân Trí Việt.

Chicago Style aipamena

Lougheed, Lin. Ielts International English Languages Testing System. Nhân Trí Việt, 2011.

MLA aipamena

Lougheed, Lin. Ielts International English Languages Testing System. Nhân Trí Việt, 2011.

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