Gaya APA

Sudarwati.Th.M, ., Grace,Eudia, . (2007). Look Ahead An English Course for Senior High School Students Year XI . Jakarta: ERLANGGA.

Gaya MLA

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