Dòng Nội dung
1
On course 1: Student book / Carol Cellman.
Oxford : Oxford University Press, 1988.
90 p. ; 30 cm.
2
On course 2 : Student book / Jacqueline Flamm.
Oxford : Oxford University Press, 1989.
90 p. ; 30 cm.
3
Workout advanced : Students' book / Paul Radley, Kathy Burke.
Harlow : Longman, 1994
149 p. : ill. ; 28 cm.