APA (7th ed.) Citation

Sowerby, G. B. (2013). A Conchological Manual. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sowerby, George Brettingham. A Conchological Manual. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Sowerby, George Brettingham. A Conchological Manual. Project Gutenberg, 2013.

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