Richards, Jack C.
Approaches and methods in language teaching
Cambridge University Press, 2006
 Buku Teks
Richards, Jack C.
Approaches and methods in language teaching
Cambridge University Press, 1994
 Buku Teks
Richards, Jack C.
Approaches and methods in language teaching : a discription and analysis
Cambridge University Press, 1994
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Morris, I.
The teaching of english as a second language : principles and methods / I. Morris
Macmillan, 1950
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Approaches to teaching foreign languages
edited by M.G. Hesse
North-Holland, 1975
 Buku Teks SO