Frank, P. (1946). International Encyclopedia of Unified Science. Chicago: The University of Chicago Press.
शिकागो स्टाइल उद्धरणFrank, Philipp. International Encyclopedia of Unified Science. Chicago: The University of Chicago Press, 1946.
एमएलए उद्धरणFrank, Philipp. International Encyclopedia of Unified Science. Chicago: The University of Chicago Press, 1946.
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