Gelb, M. J. (2004). How to think like Leonardo da Vinci: Seven steps to genius every day. Delta trade.
استشهاد بنمط شيكاغوGelb, Michael J. How to Think like Leonardo Da Vinci: Seven Steps to Genius Every Day. New York: Delta trade, 2004.
MLA استشهادGelb, Michael J. How to Think like Leonardo Da Vinci: Seven Steps to Genius Every Day. Delta trade, 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.