United Nations. (1971). The selection and acceptance testing of metal cutting machine tools: A practical guide for developing countries. United Nations.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations. The Selection and Acceptance Testing of Metal Cutting Machine Tools: A Practical Guide for Developing Countries. United Nations, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations. The Selection and Acceptance Testing of Metal Cutting Machine Tools: A Practical Guide for Developing Countries. United Nations, 1971.
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