Healy, Phyllis M.
The Institute of Nationale Language and The Summer Institute Linguistics, 1960
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Fanselow, Gisbert
Tubingen Francke 1987
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Botha, Rudolf P.
Mouton, 1968
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Newmeyer, Frederick J.
Routledge, 1996
Buku Teks SO
Roma Bulzoni 1977
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