APA (7th ed.) Citation

Interborough Rapid Transit Company. (2006). The New York Subway Its Construction and Equipment. Project Gutenberg.

Chicago Style (17th ed.) Citation

Interborough Rapid Transit Company. The New York Subway Its Construction and Equipment. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Interborough Rapid Transit Company. The New York Subway Its Construction and Equipment. Project Gutenberg, 2006.

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