APA-referens (7:e uppl.)

Birch, W. R., & Cooperman, E. T. (2009). The country seats of the United States. University of Pennsylvania Press.

Chicago-referens (17:e uppl.)

Birch, William Russell, och Emily T. Cooperman. The Country Seats of the United States. Philadelphia: University of Pennsylvania Press, 2009.

MLA-referens (9:e uppl.)

Birch, William Russell, och Emily T. Cooperman. The Country Seats of the United States. University of Pennsylvania Press, 2009.