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Gaya APA

Handoyo, D. (2018). Panduan Praktis Membuat Biogas Portabel Skala Rumah Tangga dan Industri . Yogyakarta: Andi.

Gaya MLA

Handoyo, Dkk. "Panduan Praktis Membuat Biogas Portabel Skala Rumah Tangga dan Industri". Yogyakarta: Andi, 2018. Text.