E Walker. (1995). Grammar practical for intermediate students with answer key: Song ngữ. Tp. HCM: Trẻ.
Chicago-стиль цитированияE Walker. Grammar Practical for Intermediate Students With Answer Key: Song Ngữ. Tp. HCM: Trẻ, 1995.
MLA-цитированиеE Walker. Grammar Practical for Intermediate Students With Answer Key: Song Ngữ. Tp. HCM: Trẻ, 1995.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.