BITTEL, L. R. (1964). Management By Exception Systematizing And Simplifying The Managerial Job Lester R. Bittel. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBITTEL, Lester R. Management By Exception Systematizing And Simplifying The Managerial Job Lester R. Bittel. McGraw-Hill, 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBITTEL, Lester R. Management By Exception Systematizing And Simplifying The Managerial Job Lester R. Bittel. McGraw-Hill, 1964.
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