APA (7th ed.) Citation

Phelps, A. H., & Freas, K. (2010). The Merchants of Venus. Project Gutenberg.

Chicago Style (17th ed.) Citation

Phelps, A. H., and Kelly Freas. The Merchants of Venus. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Phelps, A. H., and Kelly Freas. The Merchants of Venus. Project Gutenberg, 2010.

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