Spiegel, L. (1991). Applied Statics And Strength Of Materials Leonard Spiegel; George F. Limbrunner. Macmilan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpiegel, Leonard. Applied Statics And Strength Of Materials Leonard Spiegel; George F. Limbrunner. Macmilan, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpiegel, Leonard. Applied Statics And Strength Of Materials Leonard Spiegel; George F. Limbrunner. Macmilan, 1991.
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