Rivers, Wilga M.
Speaking in many tongues: essays in foreign-language teaching
Cambridge University Press, 1985
 Buku Teks
Approaches to teaching foreign languages
edited by M.G. Hesse
North-Holland, 1975
 Buku Teks
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.
The Context of language teaching
Cambridge University Press, 1985
 Buku Teks