Walker, E., Elsworth, S., & Nguyễn Văn Phước. (2001). Grammar practice for pre - intermediate students. Tp.HCM: Nxb Trẻ.
Stile di citazione ChicagoWalker, Elaine., Steve Elsworth, e Nguyễn Văn Phước. Grammar Practice for Pre - Intermediate Students. Tp.HCM: Nxb Trẻ, 2001.
Citazione MLAWalker, Elaine., Steve Elsworth, e Nguyễn Văn Phước. Grammar Practice for Pre - Intermediate Students. Tp.HCM: Nxb Trẻ, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.