एपीए उद्धरण

Joseph , S., & Lehmann , J. (2009). Biochar for environmental management: Science and technology. Earthscan.

शिकागो स्टाइल उद्धरण

Joseph , Stephen, और Johannes Lehmann. Biochar for Environmental Management: Science and Technology. London: Earthscan, 2009.

एमएलए उद्धरण

Joseph , Stephen, और Johannes Lehmann. Biochar for Environmental Management: Science and Technology. Earthscan, 2009.