APA (7th ed.) Citation

Altsheler, J. A. (2010). The Guns of Europe. Project Gutenberg.

Chicago Style (17th ed.) Citation

Altsheler, Joseph A. The Guns of Europe. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Altsheler, Joseph A. The Guns of Europe. Project Gutenberg, 2010.

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