Walker, E., Elsworth, S., & Nguyễn Văn Phước. (2003). Grammar practice for intermediate students: With answers (New ed.). Tp.HCM: Nxb Trẻ.
Styl cytowania ChicagoWalker, Elaine., Steve Elsworth, i Nguyễn Văn Phước. Grammar Practice for Intermediate Students: With Answers. New ed. Tp.HCM: Nxb Trẻ, 2003.
Styl cytowania MLAWalker, Elaine., Steve Elsworth, i Nguyễn Văn Phước. Grammar Practice for Intermediate Students: With Answers. New ed. Tp.HCM: Nxb Trẻ, 2003.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..