APA (7th ed.) Citation

Piper, J. J. (2012). Facts and Figures Concerning the Hoosac Tunnel. Project Gutenberg.

Chicago Style (17th ed.) Citation

Piper, John J. Facts and Figures Concerning the Hoosac Tunnel. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Piper, John J. Facts and Figures Concerning the Hoosac Tunnel. Project Gutenberg, 2012.

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