एपीए उद्धरण

Dunlap, R. A. (2019). Sustainable energy. Australia: Cengage Learning.

शिकागो स्टाइल उद्धरण

Dunlap, Richard A. Sustainable Energy. Australia: Cengage Learning, 2019.

एमएलए उद्धरण

Dunlap, Richard A. Sustainable Energy. Australia: Cengage Learning, 2019.