APA (7th ed.) Citation

Williams, H. L., & Williams, O. K. (1966). Great houses of America. Putnam.

Chicago Style (17th ed.) Citation

Williams, Henry Lionel, and Ottalie K. Williams. Great Houses of America. New York: Putnam, 1966.

MLA (8th ed.) Citation

Williams, Henry Lionel, and Ottalie K. Williams. Great Houses of America. Putnam, 1966.

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