Collier, J. R. (1968). Effective long range business planning. Prentice-Hall of India.
शिकागो स्टाइल उद्धरणCollier, James R. Effective Long Range Business Planning. New Jersey: Prentice-Hall of India, 1968.
एमएलए उद्धरणCollier, James R. Effective Long Range Business Planning. Prentice-Hall of India, 1968.
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