Dyfyniad APA

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

Dyfyniad Arddull Chicago

Wolfson, Richard. Energy, Environment and Climate. 2nd ed. New York: W.W.Norton, 2012.

Dyfyniad MLA

Wolfson, Richard. Energy, Environment and Climate. 2nd ed. W.W.Norton, 2012.

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