Gaya APA

[et.al], A, D. (2008). Developing English Competencies, for Senior High School Grade XII of Natural and Social Science Programmes ( SMA / MA ) . Jakarta: Pusat Perbukuan Depdiknas.

Gaya MLA

[et.al], Achmad, Doddy. "Developing English Competencies, for Senior High School Grade XII of Natural and Social Science Programmes ( SMA / MA )". Jakarta: Pusat Perbukuan Depdiknas, 2008. Text.