edited by M.G. Hesse
North-Holland, 1975
Buku Teks
Routledge, 2004
Buku Teks
Huebener, Theodore
New York University Press, 1967
Buku Teks
edited by Michael Byram
Routledge, 2000 ; 2004
Buku Referensi
Richards, Jack C.
Cambridge University Press, 2006
Buku Teks