Gaya APA

Sudarwati, T, M., Grace, E. (2005). Look Ahead An English Course 1 For SMA & MA . Jakarta: Erlangga.

Gaya MLA

Sudarwati, Th., M.., Grace, Eudia. "Look Ahead An English Course 1 For SMA & MA". Jakarta: Erlangga, 2005. Text.