Graham, Stuart
The french verb book
Cambridge University Press , 1994
Buku Teks
Katamba, Francis
Morphology
Macmillan, 1994
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Graham
French
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Haider, Hubert
Verb second phenomena in Germanic
Foris Publications, 1986
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Juilland, Alphonse
The English verb system
Mouton, 1973
Buku Teks