Cita APA (7th ed.)

Long, R. E. (1989). Energy and conservation. H.W. Wilson.

Cita Chicago (17th ed.)

Long, Robert Emmet. Energy and Conservation. New York: H.W. Wilson, 1989.

Cita MLA (9th ed.)

Long, Robert Emmet. Energy and Conservation. H.W. Wilson, 1989.