Dyfyniad APA

(2004). Listen in: Student Audio CD (Book 1). Tp. Hồ Chí Minh: Nxb Tp. Hồ Chí Minh.

Dyfyniad Arddull Chicago

Listen In: Student Audio CD (Book 1). Tp. Hồ Chí Minh: Nxb Tp. Hồ Chí Minh, 2004.

Dyfyniad MLA

Listen In: Student Audio CD (Book 1). Tp. Hồ Chí Minh: Nxb Tp. Hồ Chí Minh, 2004.

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