Astuti, E. M. (2011). ENGLISH ZONE for Senior High School Students Year X. Erlangga.
Cita Chicago Style (17a ed.)Astuti, Eka Mulya. ENGLISH ZONE for Senior High School Students Year X. Erlangga, 2011.
Cita MLA (8a ed.)Astuti, Eka Mulya. ENGLISH ZONE for Senior High School Students Year X. Erlangga, 2011.
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