VOLLMANN E. (1989). MANUFACTURING PLANNING AND CONTROL SYSTEMS. GALGOTIA PUBLICATION.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVOLLMANN E. MANUFACTURING PLANNING AND CONTROL SYSTEMS. NEW DELHI: GALGOTIA PUBLICATION, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVOLLMANN E. MANUFACTURING PLANNING AND CONTROL SYSTEMS. GALGOTIA PUBLICATION, 1989.
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