Wittkower, R. (1988). Architectural principles in the age of humanism. Academy Editions.
Lua i Stíl Chicago (17ú heag.)Wittkower, Rudolf. Architectural Principles in the Age of Humanism. London: Academy Editions, 1988.
Lua MLA (9ú heag.)Wittkower, Rudolf. Architectural Principles in the Age of Humanism. Academy Editions, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.