APA (7th ed.) Citation

Rodwell, G. F. (2010). Etna: A History of the Mountain and of its Eruptions. Project Gutenberg.

Chicago Style (17th ed.) Citation

Rodwell, G. F. Etna: A History of the Mountain and of Its Eruptions. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Rodwell, G. F. Etna: A History of the Mountain and of Its Eruptions. Project Gutenberg, 2010.

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