APA (7th ed.) Citation

Marks, W. K., & Freas, K. (2010). Forsyte's Retreat. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marks, Winston K., and Kelly Freas. Forsyte's Retreat. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Marks, Winston K., and Kelly Freas. Forsyte's Retreat. Project Gutenberg, 2010.

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