Dòng Nội dung
1
2
Listen for it / Jack Richards, Deborah Gordon, Andrew Harper.
New York : Oxford University Press, 1994.
88 p. ; 27 cm.



3
The advanced grammar book, second edition : Instructor s manual / Deborah B Gordon
Boston, Mass : Heinle & Heinle Publishers, 1998
iv, 140 p.; 30 cm.