APA (7th ed.) Citation

Palacio Valdés, A., & Bell, C. (2011). Froth. Project Gutenberg.

Chicago Style (17th ed.) Citation

Palacio Valdés, Armando, and Clara Bell. Froth. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Palacio Valdés, Armando, and Clara Bell. Froth. Project Gutenberg, 2011.

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