Origins of the state : the anthropology of political evolution
edited by Ronald Cohen and Elman R. Service
Institute for the Study of Human Issues, 1978
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Fried, Morton H.
The evolution of political society
Random House, 1967
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Ember, Carol R.
Anthropology
Prentice-Hall, 1985
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Anthropology
edited by Allan H. Smith and John L. Fischer
Prentice-Hall, 1970
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Haviland, William A.
Anthropology
Rinehart and Winston, 1974
 Buku Teks SO