Dòng Nội dung
1
Help! / Philip Prowse
Cambridge : Cambridge University Press, 1999
32 p. : ill. ; 20 cm.
2
Officially dead / Richard Prescott.
Oxford : Macmillan Heinemann ELT, 2002
111 p. : ill. ; 20 cm
3
Parallel / Colin Campbell
Cambridge ; Cambridge University Press, 2003
32 p. : ill. ; 20 cm. +1 sound disc (digital ; 4 3/4 in.)