Eckersley, C.E. [Charles Ewart], 1892-1967
The essential English dictionary English-Spanish Spanish-English
Longman, Green, 1953
 Buku Referensi
McCrum, Robert
The story of english
Faber and Faber , 1992
 Buku Teks SO
Burton, Samuel Holroyd
English a-level
Macmillan, 1995
 Buku Teks SO
English usage
edited by Tim Storrie and James Matson
Cassell , 1991
 Buku Teks
Puchta, Herbert
English in mind
Cambridge University Press, 2010
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