Crampton, Richard, author
Routledge, 1996
Buku Referensi
East, Roger, author
Pinter Publishers, 1997
Buku Teks
edited by Regina Cowen Karp
Oxford University Press, 1993
Buku Teks
edited by John Odmark
John Benjamins B.V. , 1979/1980/1981/1982
Buku Teks
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