Ward-Perkins, J. B. (1981). Roman imperial architecture (2nd ed.). Penguin Books.
Lua i Stíl Chicago (17ú heag.)Ward-Perkins, John Bryan. Roman Imperial Architecture. 2nd ed. Harmondsworth, Middlesex, Eng: Penguin Books, 1981.
Lua MLA (9ú heag.)Ward-Perkins, John Bryan. Roman Imperial Architecture. 2nd ed. Penguin Books, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.