Gaya APA

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

Gaya MLA

Sudarwati, ., Grace, Eudia. "Look Ahead An English Course: For Senior High School Students Year x". - Jakarta: Erlangga, 2007. Buku Pend. Bahasa Inggris.