Lane, Richard J, author
Routledge, 2006
Buku Teks
edited by S.I. Hayakawa; revised by P.J. Fletcher
Cassell , 1981
Buku Referensi
Edited by Norbert Pachler; Ana Redondo
Routledge, 2007
Buku Teks
Dunn, John, 1940-, author
Routledge, 2009
Buku Referensi
Dunn, John A., 1949-, author
Routledge, 2009
Buku Teks