APA (7th ed.) Citation

Eaton, D. C., Emerton, J. H., & Faxon, C. E. (2014). Beautiful Ferns. Project Gutenberg.

Chicago Style (17th ed.) Citation

Eaton, Daniel Cady, J. H. Emerton, and Charles Edward Faxon. Beautiful Ferns. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Eaton, Daniel Cady, et al. Beautiful Ferns. Project Gutenberg, 2014.

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