Trask, R.L., author
London, 1998
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Edward Arnold ,
Majalah, Jurnal, Buletin
Breva-Claramonte, Manuel
Amsterdam John Benjamins Publishing 1983
Buku Teks
Fey, Marc E.
College-Hill Publication, 1986
Buku Teks
Davies, Alan, 1931 February 17-, author
Basil Blackwell, 1990
Buku Teks