APA (7th ed.) Citation

Blake, J. F. (2011). Astronomical Myths Based on Flammarions's History of the Heavens. Project Gutenberg.

Chicago Style (17th ed.) Citation

Blake, John F. Astronomical Myths Based on Flammarions's History of the Heavens. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Blake, John F. Astronomical Myths Based on Flammarions's History of the Heavens. Project Gutenberg, 2011.

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