Sjoberg, G. (1965). The Origin and Evolution of Cities. The first cities arose some 5,500 years ago; large scale urbanization began only 100 years ago. The intervening steps in the evolution of cities were nonetheless a prerequisite for modern urban societies.
Chicago Style (17th ed.) CitationSjoberg, Gideon. The Origin and Evolution of Cities. The First Cities Arose Some 5,500 Years Ago; Large Scale Urbanization Began Only 100 Years Ago. The Intervening Steps in the Evolution of Cities Were Nonetheless a Prerequisite for Modern Urban Societies. 1965.
MLA (8th ed.) CitationSjoberg, Gideon. The Origin and Evolution of Cities. The First Cities Arose Some 5,500 Years Ago; Large Scale Urbanization Began Only 100 Years Ago. The Intervening Steps in the Evolution of Cities Were Nonetheless a Prerequisite for Modern Urban Societies. 1965.