APA (7th ed.) Citation

Collins, W. W. (2011). Cathedral Cities of Italy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Collins, W. W. Cathedral Cities of Italy. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Collins, W. W. Cathedral Cities of Italy. Project Gutenberg, 2011.

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