Rivers, Wilga M.
Cambridge University Press, 1985
Buku Teks
edited by M.G. Hesse
North-Holland, 1975
Buku Teks
Richards, Jack C.
Cambridge University Press, 2006
Buku Teks
Richards, Jack C.
Cambridge University Press, 1994
Buku Teks
Richards, Jack C.
Cambridge University Press, 1985
Buku Teks