RAO P N. (2013). MANUFACTURING TECHNOLOGY FOUNDRY,FORMING AND WELDING (4th.). MC GRAW HILL.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRAO P N. MANUFACTURING TECHNOLOGY FOUNDRY,FORMING AND WELDING. 4th. NEW DELHI: MC GRAW HILL, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRAO P N. MANUFACTURING TECHNOLOGY FOUNDRY,FORMING AND WELDING. 4th. MC GRAW HILL, 2013.
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