APA (7th ed.) Citation

Marcin, M. (2006). The Substitute Prisoner. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marcin, Max. The Substitute Prisoner. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Marcin, Max. The Substitute Prisoner. Project Gutenberg, 2006.

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