Dyfyniad APA

Harford, T. (2006). The undercover economist. Little Brown.

Dyfyniad Arddull Chicago

Harford, Tim. The Undercover Economist. London: Little Brown, 2006.

Dyfyniad MLA

Harford, Tim. The Undercover Economist. Little Brown, 2006.

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