Gaya APA

sudarwati, . (2007). Look Ahead Book 2 : An English Course For Senior High School Students Year XI Science And Social Study Program . Jakarta: Penerbit Erlangga.

Gaya MLA

sudarwati, . "Look Ahead Book 2 : An English Course For Senior High School Students Year XI Science And Social Study Program". Jakarta: Penerbit Erlangga, 2007. Text.