Spence, J. D. (1985). The memory palace of Matteo Ricci. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Spence, Jonathan D. The Memory Palace of Matteo Ricci. New York, N.Y.: Penguin Books, 1985.
Lua MLA (8ú heag.)Spence, Jonathan D. The Memory Palace of Matteo Ricci. Penguin Books, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.