Gaya APA

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

Gaya MLA

Grace, Eudia., Sudarwati, M. "Look ahead an English Course for Senior High School Students Year XI : Science and Social Study Program". Jakarta: Erlangga, 2006. Buku Penunjang.