Friedrich, C. J. (1967). Introduction to Political theory: Twelve Lectures at Harvard. Jaico.
शिकागो स्टाइल उद्धरणFriedrich, Carl J. Introduction to Political Theory: Twelve Lectures at Harvard. Bombay: Jaico, 1967.
एमएलए उद्धरणFriedrich, Carl J. Introduction to Political Theory: Twelve Lectures at Harvard. Jaico, 1967.
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