APA (7th ed.) Citation

Symons, A. (2007). Figures of Several Centuries. Project Gutenberg.

Chicago Style (17th ed.) Citation

Symons, Arthur. Figures of Several Centuries. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Symons, Arthur. Figures of Several Centuries. Project Gutenberg, 2007.

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