Lougheed, L. (2012). Barron's writing for the Toefl iBT. Tp.Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh.
Dyfyniad Arddull ChicagoLougheed, Lin. Barron's Writing for the Toefl IBT. Tp.Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh, 2012.
Dyfyniad MLALougheed, Lin. Barron's Writing for the Toefl IBT. Tp.Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.