Gaya APA

Sudarwati, ., Grace, E. (2006). Look Ahead : An English Course For Senior High School Student Year X (7). Jakarta: Erlangga.

Gaya MLA

Sudarwati, ., Grace, Eudia. "Look Ahead : An English Course For Senior High School Student Year X". 7 Jakarta: Erlangga, 2006. Text.