APA (7th ed.) Citation

Optic, O., & Bridgman, L. J. (2006). On The Blockade. Project Gutenberg.

Chicago Style (17th ed.) Citation

Optic, Oliver, and L. J. Bridgman. On The Blockade. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Optic, Oliver, and L. J. Bridgman. On The Blockade. Project Gutenberg, 2006.

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