Tyler, N., Ligibel, T., & Tyler, I. R. (2009). Historic preservation: An introduction to its history, principles, and practice (2nd edition.). W.W. Norton & Co.
Chicago-referens (17:e uppl.)Tyler, Norman, Ted Ligibel, och Ilene R. Tyler. Historic Preservation: An Introduction to Its History, Principles, and Practice. 2nd edition. New York: W.W. Norton & Co, 2009.
MLA-referens (9:e uppl.)Tyler, Norman, et al. Historic Preservation: An Introduction to Its History, Principles, and Practice. 2nd edition. W.W. Norton & Co, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.