Ayers, David
Blackwell Publishing, 2008
Buku Teks
Klarer, Mario, 1962-
Routledge, 2005
Buku Teks
Klarer, Mario, 1962-
Routledge, 2005
Buku Teks
edited by Ralph Cohen
Johns Hopkins University Press, 1974
Buku Teks
Crane, R.S.
University of Chicago Press, 1971
Buku Teks