एपीए उद्धरण

Burchfield, J. D. (1975). Lord Kelvin and the age of the earth. Macmillan.

शिकागो स्टाइल उद्धरण

Burchfield, Joe D. Lord Kelvin and the Age of the Earth. London: Macmillan, 1975.

एमएलए उद्धरण

Burchfield, Joe D. Lord Kelvin and the Age of the Earth. Macmillan, 1975.