Gaya APA

Grace, T, M, S, &, E. (2007). Look Ahead Book 3 : An English Course for Senior High School Students Year XII Science and Social Study Program . Jakarta: Erlangga.

Gaya MLA

Grace, Th., M., Sudarwati, &, Eudia. "Look Ahead Book 3 : An English Course for Senior High School Students Year XII Science and Social Study Program". Jakarta: Erlangga, 2007. Text.