BARNES, R. M., & BARNES, R. M. (1980). Motion And Time Study Design And Measurement Of Work. John Wiley & Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBARNES, Ralph M., और Ralph M. BARNES. Motion And Time Study Design And Measurement Of Work. John Wiley & Sons, 1980.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBARNES, Ralph M., और Ralph M. BARNES. Motion And Time Study Design And Measurement Of Work. John Wiley & Sons, 1980.
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