APA (7th ed.) Citation

Balzac, H. d., Bell, C., & Waring, J. (2004). The Elixir of Life. Project Gutenberg.

Chicago Style (17th ed.) Citation

Balzac, Honoré de, Clara Bell, and James Waring. The Elixir of Life. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Balzac, Honoré de, et al. The Elixir of Life. Project Gutenberg, 2004.

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