APA (7th ed.) Citation

Gray, P., & Woodward, B. B. (2011). Sea-Weeds, Shells and Fossils. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gray, Peter, and B. B. Woodward. Sea-Weeds, Shells and Fossils. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Gray, Peter, and B. B. Woodward. Sea-Weeds, Shells and Fossils. Project Gutenberg, 2011.

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