Gaya APA

Grace, E., Sudarwati, T, M. (2007). Look Ahead An English CoursernFor Senior High School Students XIIrnScience And Social Study Program . JAKARTA: PENERBIT ERLANGGA.

Gaya MLA

Grace, Eudia., Sudarwati, Th., M.. "Look Ahead An English CoursernFor Senior High School Students XIIrnScience And Social Study Program". JAKARTA: PENERBIT ERLANGGA, 2007. Text.