Dyfyniad APA

(2013). Lessons for IELTS: Advanced writing. Tp.HCM: Nxb. Tổng hợp Tp.HCM : Nhân Trí Việt.

Dyfyniad Arddull Chicago

Lessons for IELTS: Advanced Writing. Tp.HCM: Nxb. Tổng hợp Tp.HCM : Nhân Trí Việt, 2013.

Dyfyniad MLA

Lessons for IELTS: Advanced Writing. Tp.HCM: Nxb. Tổng hợp Tp.HCM : Nhân Trí Việt, 2013.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.