Dyfyniad APA

Walker, E., Elsworth, S., & Nguyễn Văn Phước. (2001). Grammar practice for upper intermediate students (New ed.). Tp.HCM: Nxb Trẻ.

Dyfyniad Arddull Chicago

Walker, Elaine., Steve Elsworth, và Nguyễn Văn Phước. Grammar Practice for Upper Intermediate Students. New ed. Tp.HCM: Nxb Trẻ, 2001.

Dyfyniad MLA

Walker, Elaine., Steve Elsworth, và Nguyễn Văn Phước. Grammar Practice for Upper Intermediate Students. New ed. Tp.HCM: Nxb Trẻ, 2001.

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