Swan, Michael, author
The Cambridge English course
Cambridge University Press, 1987
 Buku Teks
Swan, Michael, author
The new cambridge english course 3
Cambridge University Press, 1992
 Buku Teks
Allsop, Jake
English for Cambridge first certificate: a new course / by Jake Allsop
Cassell, 1981
 Buku Teks
Swan, Michael, author
The new Cambridge English course. Student 4, Upper-intermediate
Cambridge University Press, 1993
 Buku Teks
Peters, Pam, author
The Cambridge guide to English usage
Cambridge University Press, 2006
 Buku Referensi
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