APA (7th ed.) Citation

Douglas, R. L. (1944). Leonardo da Vinci; his life and pictures. University of Chicago press.

Chicago Style (17th ed.) Citation

Douglas, R. Langton. Leonardo Da Vinci; His Life and Pictures. Chicago: University of Chicago press, 1944.

MLA (9th ed.) Citation

Douglas, R. Langton. Leonardo Da Vinci; His Life and Pictures. University of Chicago press, 1944.