APA (7th ed.) Citation

Grace, E., & SUDARWATI, T. M. (2007). Look ahead an English course 2 For Senior High School Students Year XI. ERLANGGA.

Chicago Style (17th ed.) Citation

Grace, Eudia, and Th. M. SUDARWATI. Look Ahead an English Course 2 For Senior High School Students Year XI. ERLANGGA, 2007.

MLA (8th ed.) Citation

Grace, Eudia, and Th. M. SUDARWATI. Look Ahead an English Course 2 For Senior High School Students Year XI. ERLANGGA, 2007.

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