Gaya APA

Sudarwati, T, M., Grace, E. (2007). Look Ahead 2: An English Course for Senior High School Year XI (Pertama). Jakarta: ERLANGGA.

Gaya MLA

Sudarwati, Th., M.., Grace, Eudia. "Look Ahead 2: An English Course for Senior High School Year XI". Pertama Jakarta: ERLANGGA, 2007. Text.