APA (7th ed.) Citation

Gray, P. W. Sea-Weeds, Shells and Fossils.

Chicago Style (17th ed.) Citation

Gray, Peter; Woodward. Sea-Weeds, Shells and Fossils.

MLA (9th ed.) Citation

Gray, Peter; Woodward. Sea-Weeds, Shells and Fossils.

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