APA (7th ed.) Citation

Allain, M., & Souvestre, P. (2009). A Royal Prisoner. Project Gutenberg.

Chicago Style (17th ed.) Citation

Allain, Marcel, and Pierre Souvestre. A Royal Prisoner. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Allain, Marcel, and Pierre Souvestre. A Royal Prisoner. Project Gutenberg, 2009.

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