Gaya APA

Sudarwati, T., Grace, E. (2007). Look Ahead An English Course: For Senior High School Students Year XI (9). Jakarta: Erlangga.

Gaya MLA

Sudarwati, Th.M.., Grace, Eudia. "Look Ahead An English Course: For Senior High School Students Year XI". 9 Jakarta: Erlangga, 2007. Text.