Dyfyniad APA

Wolfson, R. A. (2012). Energy, environment and climate (2nd ed.).

Dyfyniad Arddull Chicago

Wolfson, Richard; Author. Energy, Environment and Climate. 2nd ed. New York, W W Norton & Company, Inc, 2012.

Dyfyniad MLA

Wolfson, Richard; Author. Energy, Environment and Climate. 2nd ed. 2012.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.