APA (7th ed.) Citation

Flammarion, C., Myrbach-Rheinfeld, F., Gambard, Bieler, d., & Stetson, A. R. (2013). Urania. Project Gutenberg.

Chicago Style (17th ed.) Citation

Flammarion, Camille, Felician Myrbach-Rheinfeld, Gambard, de Bieler, and Augusta Rice Stetson. Urania. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Flammarion, Camille, et al. Urania. Project Gutenberg, 2013.

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