APA (7 वां संस्करण) प्रशस्ति पत्र

RAO P N. (2013). MANUFACTURING TECHNOLOGY METALCUTTING AND MACHINE TOOLS (3rd.). MC GRAW HILL.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

RAO P N. MANUFACTURING TECHNOLOGY METALCUTTING AND MACHINE TOOLS. 3rd. NEW DELHI: MC GRAW HILL, 2013.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

RAO P N. MANUFACTURING TECHNOLOGY METALCUTTING AND MACHINE TOOLS. 3rd. MC GRAW HILL, 2013.