APA (7th ed.) Citation

Boyer, C. S. (2014). The Diatomaceae of Philadelphia and Vicinity. Project Gutenberg.

Chicago Style (17th ed.) Citation

Boyer, Charles Sumner. The Diatomaceae of Philadelphia and Vicinity. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Boyer, Charles Sumner. The Diatomaceae of Philadelphia and Vicinity. Project Gutenberg, 2014.

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