APA-referens (7:e uppl.)

Ward-Perkins, J. B. (1981). Roman imperial architecture (2nd ed.). Penguin Books.

Chicago-referens (17:e uppl.)

Ward-Perkins, John Bryan. Roman Imperial Architecture. 2nd ed. Harmondsworth, Middlesex, Eng: Penguin Books, 1981.

MLA-referens (9:e uppl.)

Ward-Perkins, John Bryan. Roman Imperial Architecture. 2nd ed. Penguin Books, 1981.