APA (7th ed.) Citation

Wardiman, A., Jahur, M. B., & Djusma, M. S. (2008). English in focus for grade vii junior high school ( smp/ mts). Pusat Perbukuan, Departemen Pendidikan Nasional.

Chicago Style (17th ed.) Citation

Wardiman, Artono, Masduki B. Jahur, and M. Sukirman Djusma. English in Focus for Grade Vii Junior High School ( Smp/ Mts). Pusat Perbukuan, Departemen Pendidikan Nasional, 2008.

MLA (8th ed.) Citation

Wardiman, Artono, et al. English in Focus for Grade Vii Junior High School ( Smp/ Mts). Pusat Perbukuan, Departemen Pendidikan Nasional, 2008.