APA (7th ed.) Citation

Herrmann, O., Ehrlich, F., & Heydt, H. A. (2010). Pirates and Piracy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Herrmann, Oscar, Frederick Ehrlich, and Herman A. Heydt. Pirates and Piracy. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Herrmann, Oscar, et al. Pirates and Piracy. Project Gutenberg, 2010.

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