Gaya APA

Grace, T, M, S, , D, E. (2007). Look Ahead An English Course for Senior High School Students Yera XI Jilid 2 KTSP 2006 (1). Jakarta: Crown publishers.

Gaya MLA

Grace, Th., M., Sudarwati, , Dan, Eudia. "Look Ahead An English Course for Senior High School Students Yera XI Jilid 2 KTSP 2006". 1 Jakarta: Crown publishers, 2007. Text.