@book{205720,
	author = {NUGRAHA, Tutun and Didik Sunardi},
	title = {Sains Energi Terbarukan : Energi Biomassa, Biofuel, Biodiesel, dan Biogas},
	publisher = {Pelangi Ilmu Nusantara},
	year = {2012},
	address = {s.l}
}