Holt, Rinehart and Winston, 1990
Buku Teks
edited by Eric P. Hamp, Fred W. Householder, Robert Austerlitz
University of Chicago Press, 1966
Buku Referensi
Bloomfield, Leonard, author
Dewan Bahasa dan Pustaka, 1992
Buku Teks
Fabb, Nigel, author
Camridge University Press , 2002
Buku Teks
edited by Ralph Fasold and Jeff Connor-Linton
Cambridge University Press, 2006
Buku Teks