Boller, P. F. (1969). American thought in transition: The impact of evolutionary naturalism, 1865 - 1900. Chicago: Rand McNally.
शिकागो स्टाइल उद्धरणBoller, Paul F. American Thought in Transition: The Impact of Evolutionary Naturalism, 1865 - 1900. Chicago: Rand McNally, 1969.
एमएलए उद्धरणBoller, Paul F. American Thought in Transition: The Impact of Evolutionary Naturalism, 1865 - 1900. Chicago: Rand McNally, 1969.
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