Gaya APA

SUDARWATI, T, M., GRACE, E. (2007). Look Ahead Book 2: An English Course For Senior High School Students Year XI Science And Social Study Program (1st). Jakarta: Erlangga.

Gaya MLA

SUDARWATI, Th., M.., GRACE, Eudia. "Look Ahead Book 2: An English Course For Senior High School Students Year XI Science And Social Study Program". 1st Jakarta: Erlangga, 2007. Printed.