Saalman, Howard (1968). Medieval cities. New York: George Braziller. p. 11. Consultado el 20 de enero de 2021. «A city is a tool for the production and exchange of goods and services. A city may also be a place where people live, study, play, worship, or have children. It may be a place of magic or of terror, of beauty or of ugliness. But such things are true of other places as well, fields, mountaintops or caves—and such attributes are subjective and secondary to the essential function of a city.»
Saalman, Howard (1968). Medieval cities. New York: George Braziller. p. 36.
Saalman, Howard (1968). Medieval cities. New York: George Braziller. pp. 36-37.
