Tolong jelaskan mengenai Rujukan dari Chiefdom dalam bahasa melayu

Chiefdom: Precursor of the Tribe?

Origins and Evolution of Chiefdoms

Was the Chiefdom a Congelation of Ideas? by Robert L. Carneiro. In Grinin L. E. et al. Early State, Its Alternatives and Analogues. Volgograd, Uchitel, 2004.