APA aipamena

Peni R. Pramono, & Oktaviani HS. (2005). 30 menit essay writing, writing is easy. Yogyakarta: Andi offset.

Chicago Style aipamena

Peni R. Pramono, and Oktaviani HS. 30 Menit Essay Writing, Writing Is Easy. Yogyakarta: Andi offset, 2005.

MLA aipamena

Peni R. Pramono, and Oktaviani HS. 30 Menit Essay Writing, Writing Is Easy. Yogyakarta: Andi offset, 2005.

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