Green, George S.
The college hornbook I: a system for sentence structure
Holt, Rinehart and Winston, 1972
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Peters, Pam
The Cambridge guide to English usage
Cambridge University Press, 2006
 Buku Referensi
Fowler, H.W. [Henry Watson], 1858-1933
A dictionary of modern English usage
Oxford University Press, 1950 ; 1952
 Buku Referensi
Fowler, H.W. [Henry Watson], 1858-1933
A dictionary of modern English usage
Oxford University Press, 1965
 Buku Referensi
Mager, N. H.
Encyclopedic dictionary of English usage
Prentice-Hall, 1975
 Buku Referensi