Crystal, David, 1941-, author
Blackwell Publishers, 1998
Buku Referensi
Philipp Strazny, editor
Fitzroy Dearborn, 2005
Buku Referensi
Davies, Alan, 1931 February 17-, author
Lawrence Erlbaum, 2005
Buku Referensi
Ivic, Milka
Mounton, 1970
Buku Teks
Philipp Strazny, editor
Fitzroy Dearborn, 2005
Buku Referensi