APA (7 वां संस्करण) प्रशस्ति पत्र

RAO P.N. (1994). MANUFACTURING TECHNOLOGY FOUNDER FORMING AND WELDING. TATA MC-GRAW HILL PUBLISHING CO.LTD.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

RAO P.N. MANUFACTURING TECHNOLOGY FOUNDER FORMING AND WELDING. NEW DELHI: TATA MC-GRAW HILL PUBLISHING CO.LTD, 1994.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

RAO P.N. MANUFACTURING TECHNOLOGY FOUNDER FORMING AND WELDING. TATA MC-GRAW HILL PUBLISHING CO.LTD, 1994.