APA (7th ed.) Citation

Keith, L., Roy, A., & Morrison, R. (2011). Leonardo da Vinci's "Virgin of the Rocks": Technique and the context of restoration.

Chicago Style (17th ed.) Citation

Keith, Larry, Ashok Roy, and Rachel Morrison. Leonardo Da Vinci's "Virgin of the Rocks": Technique and the Context of Restoration. 2011.

MLA (9th ed.) Citation

Keith, Larry, et al. Leonardo Da Vinci's "Virgin of the Rocks": Technique and the Context of Restoration. 2011.

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