Cooper, A. M. (1958). How to supervise people (4.). Mc GRaw- Hill Book Company Inc.
शिकागो स्टाइल उद्धरणCooper, Alfred M. How to Supervise People. 4. USA: Mc GRaw- Hill Book Company Inc, 1958.
एमएलए उद्धरणCooper, Alfred M. How to Supervise People. 4. Mc GRaw- Hill Book Company Inc, 1958.
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