Walker, E., Elsworth, S., & Nguyễn Văn Phước. (2001). Grammar practice for pre - intermediate students. Tp.HCM: Nxb Trẻ.
استشهاد بنمط شيكاغوWalker, Elaine., Steve Elsworth, و Nguyễn Văn Phước. Grammar Practice for Pre - Intermediate Students. Tp.HCM: Nxb Trẻ, 2001.
MLA استشهادWalker, Elaine., Steve Elsworth, و Nguyễn Văn Phước. Grammar Practice for Pre - Intermediate Students. Tp.HCM: Nxb Trẻ, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.