AGGARWAL HEMCHANDRA. (1992). EXECUTIVE DIRECTORY: ENGINEERING INDUSTRIES. AGGARWAL PUBLICATIONS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAGGARWAL HEMCHANDRA. EXECUTIVE DIRECTORY: ENGINEERING INDUSTRIES. MUMBAI: AGGARWAL PUBLICATIONS, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAGGARWAL HEMCHANDRA. EXECUTIVE DIRECTORY: ENGINEERING INDUSTRIES. AGGARWAL PUBLICATIONS, 1992.
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