APA (7th ed.) Citation

Fyfe, H. B., & Emshwiller, E. (2010). Fee of the Frontier. Project Gutenberg.

Chicago Style (17th ed.) Citation

Fyfe, H. B., and Ed Emshwiller. Fee of the Frontier. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Fyfe, H. B., and Ed Emshwiller. Fee of the Frontier. Project Gutenberg, 2010.

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