Gombrich, E. H., Kemp, M., Roberts, J., & Steadman, P. (1989). Leonardo da Vinci: Hayward Gallery, London, 26 January to 16 April 1989 / South Bank Centre (2. print.).
Lua i Stíl Chicago (17ú heag.)Gombrich, Ernst H., Martin Kemp, Jane Roberts, agus Philip Steadman. Leonardo Da Vinci: Hayward Gallery, London, 26 January to 16 April 1989 / South Bank Centre. 2. print. London, 1989.
Lua MLA (8ú heag.)Gombrich, Ernst H., et al. Leonardo Da Vinci: Hayward Gallery, London, 26 January to 16 April 1989 / South Bank Centre. 2. print. 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.