Alexander, W. (1982). Metal in the servise of man. New York: Penguin Book.
शिकागो स्टाइल उद्धरणAlexander, William. Metal in the Servise of Man. New York: Penguin Book, 1982.
एमएलए उद्धरणAlexander, William. Metal in the Servise of Man. New York: Penguin Book, 1982.
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