Gaya APA

Sudarwati, T, M., Grace, E. (2007). Look Ahead an English Course for Senior High School Students Year XI : Science and Social Study Program (KTSP 2006) . Jakarta: Penerbit Erlangga.

Gaya MLA

Sudarwati, Th., M.., Grace, Eudia. "Look Ahead an English Course for Senior High School Students Year XI : Science and Social Study Program (KTSP 2006)". Jakarta: Penerbit Erlangga, 2007. Text.