APA (7th ed.) Citation

Leonardo da Vinci, Baring, M., & Einstein, L. (2009). Thoughts on Art and Life. Project Gutenberg.

Chicago Style (17th ed.) Citation

Leonardo da Vinci, Maurice Baring, and Lewis Einstein. Thoughts on Art and Life. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Leonardo da Vinci, et al. Thoughts on Art and Life. Project Gutenberg, 2009.

Warning: These citations may not always be 100% accurate.