APA (7th ed.) Citation

Sudarwati, M., & Grace, E. (2006). Look Ahead An English Course for Senior High School Students Year X. Erlangga.

Chicago Style (17th ed.) Citation

Sudarwati, M., and Eudia Grace. Look Ahead An English Course for Senior High School Students Year X. Erlangga, 2006.

MLA (8th ed.) Citation

Sudarwati, M., and Eudia Grace. Look Ahead An English Course for Senior High School Students Year X. Erlangga, 2006.

Warning: These citations may not always be 100% accurate.