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Gaya APA

Djuharie, O, S. (2011). Surat Menyurat Serbaguna Panduan Korespondensi . : Yrama Widya.

Gaya MLA

Djuharie, O., Setiawan. "Surat Menyurat Serbaguna Panduan Korespondensi". : Yrama Widya, 2011. Text.