Lee Sorensen (red.): Heaton, Mary. [w:] A Biographical Dictionary of Historic Scholars, Museum Professionals and Academic Historians of Art In Association with the Department of Art, Art History and Visual Studies, Duke University [on-line]. [dostęp 2017-04-12]. [zarchiwizowane z tego adresu]. Cytat: „Heaton was among the best of the 19th-century female art historians.”
Lee Sorensen (red.): Heaton, Mary. [w:] A Biographical Dictionary of Historic Scholars, Museum Professionals and Academic Historians of Art In Association with the Department of Art, Art History and Visual Studies, Duke University [on-line]. [dostęp 2017-04-12]. [zarchiwizowane z tego adresu]. Cytat: „Heaton was among the best of the 19th-century female art historians.”
Codex Arundel 1490s–c1518. universalleonardo.org. [dostęp 2024-04-28]. [zarchiwizowane z [brak tego adresu] (2024-04-28)]. (ang.).
Codex Atlanticus. leonardo-ambrosiana.it. [dostęp 2024-04-28]. [zarchiwizowane z tego adresu (2018-10-06)]. (ang.).
Codex Urbinas and lost Libro A 1508. universalleonardo.org. [dostęp 2024-04-28]. [zarchiwizowane z [brak tego adresu] (2024-04-19)]. (ang.).