Wray, W. (2005). Leonardo da Vinci: In his own words. Arctus.
Cita Chicago (17th ed.)Wray, William. Leonardo Da Vinci: In His Own Words. London: Arctus, 2005.
Cita MLA (9th ed.)Wray, William. Leonardo Da Vinci: In His Own Words. Arctus, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.