Astuti, E. M. (2011). ENGLISH ZONE for Senior High School Year XI. Erlangga.
Chicago Style aipamenaAstuti, Eka Mulya. ENGLISH ZONE for Senior High School Year XI. Erlangga, 2011.
MLA aipamenaAstuti, Eka Mulya. ENGLISH ZONE for Senior High School Year XI. Erlangga, 2011.
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