APA (7th ed.) Citation

Mansfield, M. F., & McManus, B. (2009). The Cathedrals of Northern France. Project Gutenberg.

Chicago Style (17th ed.) Citation

Mansfield, M. F., and Blanche McManus. The Cathedrals of Northern France. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Mansfield, M. F., and Blanche McManus. The Cathedrals of Northern France. Project Gutenberg, 2009.

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