Barker, E. (1951). Principles of social and political theory. London: Oxford University Press.
शिकागो स्टाइल उद्धरणBarker, Ernest. Principles of Social and Political Theory. London: Oxford University Press, 1951.
एमएलए उद्धरणBarker, Ernest. Principles of Social and Political Theory. London: Oxford University Press, 1951.
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