APA-referens

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

Chicago-stil citat

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

MLA-referens

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