Barker, D.W.
Exercises in good English book 3 / D. W. Barker
Macmillan and Co., 1953
 Buku Teks
Puchta, Herbert
English in mind : student's book 3
Cambridge University Press, 2010
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French, F. G.
Self-help exercises for practice in English; Book III
Oxford University Press, 1947
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Pack, Alice C.
Writing and combining standard english sentences book 1
Newbury House Pub., 1980
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Tomasowa, Francien Herlen
English for non-english departements
Universitas Brawijaya , 2005
 Buku Teks SO