Dyfyniad APA

Gelb, M. J. (2004). How to think like Leonardo da Vinci: Seven steps to genius every day. Delta trade.

Dyfyniad Arddull Chicago

Gelb, Michael J. How to Think like Leonardo Da Vinci: Seven Steps to Genius Every Day. New York: Delta trade, 2004.

Dyfyniad MLA

Gelb, Michael J. How to Think like Leonardo Da Vinci: Seven Steps to Genius Every Day. Delta trade, 2004.

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