Dòng Nội dung
1
Activate your English : pre-intermediate : coursebook / Barbara Sinclair.
New York : Cambridge University Press, 1995
88 p. ; 30 cm.
2
Activate your English : pre-intermediate self-study : workbook / Barbara Sinclair, Gregory Hoehner.
Cambridge : Cambridge University Press, 1996
55 p. ; 30 cm.