Ellis, R. H. (1994). The case books of Dr. John Snow. The Wellcome Trust Centre for the History of Medicine.
शिकागो स्टाइल उद्धरणEllis, R. H. The Case Books of Dr. John Snow. The Wellcome Trust Centre for the History of Medicine, 1994.
एमएलए उद्धरणEllis, R. H. The Case Books of Dr. John Snow. The Wellcome Trust Centre for the History of Medicine, 1994.
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