Gaya APA

SUGENG, A. et al (2009). Developing English Competencies 2 : For Senior High School (SMA/MA) Grade XI of Natural and Social Science Programmes . JAKARTA: PUSAT PERBUKUAN DEPARTEMEN PENDIDIKAN NASIIONAL.

Gaya MLA

SUGENG, AHMAD. et al. "Developing English Competencies 2 : For Senior High School (SMA/MA) Grade XI of Natural and Social Science Programmes". JAKARTA: PUSAT PERBUKUAN DEPARTEMEN PENDIDIKAN NASIIONAL, 2009. Text.