Milner, Jean Claude
St. Martin’s Press, 1990
Buku Teks
Lyons, John, author
Cambridge University Press, 1991
Buku Teks
edited by N.E. Collinge
Routledge, 1990
Buku Referensi
Crystal, David, 1941-, author
Nuansa Cendekia, 2015
Buku Referensi
Crystal, David, 1941-, author
Cambridge University Press, 1991
Buku Referensi