Geoffrey, Leech N.
Longmans, 1993
Buku Teks
Linguistic Analysis, 1996
Majalah, Jurnal, Buletin
Columbia : Columbia University Press and American Dialect Society
Majalah, Jurnal, Buletin
Artikel Jurnal
by Bernard Bloch, George L. Trager
Baltimore, 1942
Buku Referensi