Doddy, A. (2008). Developing English Competencies: For Senior High School (SMA/MA) Grade X. Pusat Perbukuan Depdiknas.
Chicago-viite (17. p.)Doddy, Achmad. Developing English Competencies: For Senior High School (SMA/MA) Grade X. Pusat Perbukuan Depdiknas, 2008.
MLA-viite (8. p.)Doddy, Achmad. Developing English Competencies: For Senior High School (SMA/MA) Grade X. Pusat Perbukuan Depdiknas, 2008.
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