Gaya APA

Astuti, E, M., Valentina, A. (2011). English Zone [Jilid 3]: for Senior High School Students Year XII (Cet. 2.--). Jakarta: Erlangga.

Gaya MLA

Astuti, Eka, Mulya., Valentina, Anna. "English Zone [Jilid 3]: for Senior High School Students Year XII". Cet. 2.-- Jakarta: Erlangga, 2011. Text.