Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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