Gaya APA

Grace, E., Sudarwati, . (2007). Look Ahead Book 3 " An English Course For Senior High School Students Year XII" : Science And Social Study Program (9). Jakarta: Erlangga.

Gaya MLA

Grace, Eudia., Sudarwati, . "Look Ahead Book 3 " An English Course For Senior High School Students Year XII" : Science And Social Study Program". 9 Jakarta: Erlangga, 2007. Text.