Dyfyniad APA

 Kerr, K. (2007).  A maniac commodity trader’s guide to making a fortune: A not-so crazy roadmap to riches.  John Wiley & Sons.

Dyfyniad Arddull Chicago

 Kerr, Kevin.  A Maniac Commodity Trader’s Guide to Making a Fortune: A Not-so Crazy Roadmap to Riches.  John Wiley & Sons, 2007.

Dyfyniad MLA

 Kerr, Kevin.  A Maniac Commodity Trader’s Guide to Making a Fortune: A Not-so Crazy Roadmap to Riches.  John Wiley & Sons, 2007.

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