Grusky, David B. (2011). "Theories of Stratification and Inequality". في Ritzer, George and J. Michael Ryan (المحرر). The Concise Encyclopedia of Sociology. Wiley-Blackwell. ص. 622–624. مؤرشف من الأصل في 2016-09-01. اطلع عليه بتاريخ 2014-06-23.
Ingold, Tim (2006) "On the social relations of the hunter-gatherer band," in Richard B. Lee[لغات أخرى] and Richard H. Daly (eds.), The Cambridge Encyclopedia of Hunters and Gatherers, p. 400. New York: Cambridge University Press. (ردمك 0-521-60919-4)
Barnard, Alan (2006) "Images of hunters and gatherers in European social thought," in Richard B. Lee[لغات أخرى] and Richard H. Daly (eds.), The Cambridge Encyclopedia of Hunters and Gatherers, p. 379. New York: Cambridge University Press. (ردمك 0-521-60919-4)
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Grusky, David B. (2011). "Theories of Stratification and Inequality". في Ritzer, George and J. Michael Ryan (المحرر). The Concise Encyclopedia of Sociology. Wiley-Blackwell. ص. 622–624. مؤرشف من الأصل في 2016-09-01. اطلع عليه بتاريخ 2014-06-23.
