Gaya APA

Suhardan, D., Astuti, E, M. (2011). English Zone 1 For Senior High School Students Year X . Jakarta: Erlangga.

Gaya MLA

Suhardan, Dadang., Astuti, Eka, Mulya. "English Zone 1 For Senior High School Students Year X". Jakarta: Erlangga, 2011. Text.