APA (7th ed.) Citation

Williamson, G. C. (2011). Great Masters in Painting: Perugino. Project Gutenberg.

Chicago Style (17th ed.) Citation

Williamson, George Charles. Great Masters in Painting: Perugino. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Williamson, George Charles. Great Masters in Painting: Perugino. Project Gutenberg, 2011.

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