Service, E. R. (1975). Origins of the state and civilization: The process of cultural evolution. Norton.
Citazione stile Chigago Style (17a edizione)Service, Elman Rogers. Origins of the State and Civilization: The Process of Cultural Evolution. New York: Norton, 1975.
Citatione MLA (9a ed.)Service, Elman Rogers. Origins of the State and Civilization: The Process of Cultural Evolution. Norton, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.