APA (7th ed.) Citation

Keith, L. (2016). The National Gallery "Virgin of the Rocks" revisited.

Chicago Style (17th ed.) Citation

Keith, Larry. The National Gallery "Virgin of the Rocks" Revisited. 2016.

MLA (9th ed.) Citation

Keith, Larry. The National Gallery "Virgin of the Rocks" Revisited. 2016.

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