APA (7th ed.) Citation

Hamilton, W., & Cadell, T. (2011). Observations on Mount Vesuvius, Mount Etna, and Other Volcanos. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hamilton, William, and Thomas Cadell. Observations on Mount Vesuvius, Mount Etna, and Other Volcanos. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Hamilton, William, and Thomas Cadell. Observations on Mount Vesuvius, Mount Etna, and Other Volcanos. Project Gutenberg, 2011.

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