APA (7th ed.) Citation

Porter, A. K. (1969). Medieval architecture. Hacker Art Books.

Chicago Style (17th ed.) Citation

Porter, Arthur Kingsley. Medieval Architecture. New York: Hacker Art Books, 1969.

MLA (9th ed.) Citation

Porter, Arthur Kingsley. Medieval Architecture. Hacker Art Books, 1969.

Warning: These citations may not always be 100% accurate.