Clark, K. (1958). Leonardo da Vinci: An account of his development as an artist (Überarbeitete Auflage.). Penguin.
Lua i Stíl Chicago (17ú heag.)Clark, Kenneth. Leonardo Da Vinci: An Account of His Development as an Artist. Überarbeitete Auflage. Harmondsworth: Penguin, 1958.
Lua MLA (8ú heag.)Clark, Kenneth. Leonardo Da Vinci: An Account of His Development as an Artist. Überarbeitete Auflage. Penguin, 1958.
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