1. Perry, C. A. (1929) The Neighborhood Unite, Regional Survey of New York and Its Environs VII, Trans. and ed. Lee, Y. as The Neighborhood Unit Theory: How the city became the present, Communication books, 2013, Korea.
2. Perry, C. A. (1939) Housing for the Machine Age. Russell Sage Foundation, New York.
3. Perry, C. A. (1966) The neighborhood Unit Formula, Urban Housing, New York: The Free Press, p.65.