APA (7th ed.) Citation

Tower, G. B. N. (2005). Instructions on Modern American Bridge Building. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tower, G. B. N. Instructions on Modern American Bridge Building. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Tower, G. B. N. Instructions on Modern American Bridge Building. Project Gutenberg, 2005.

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