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.