APA (7th ed.) Citation

Riley, P. M., & Cousins, F. (2009). The Colonial Architecture of Philadelphia. Project Gutenberg.

Chicago Style (17th ed.) Citation

Riley, Phil M., and Frank Cousins. The Colonial Architecture of Philadelphia. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Riley, Phil M., and Frank Cousins. The Colonial Architecture of Philadelphia. Project Gutenberg, 2009.

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