INTERNATIONAL LABOUR OFFICE. (1986). INTRODUCTION TO WORK STUDY (3.). INTERNATIONAL LABOUR ORGANIZATION.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रINTERNATIONAL LABOUR OFFICE. INTRODUCTION TO WORK STUDY. 3. BOMBAY: INTERNATIONAL LABOUR ORGANIZATION, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रINTERNATIONAL LABOUR OFFICE. INTRODUCTION TO WORK STUDY. 3. INTERNATIONAL LABOUR ORGANIZATION, 1986.
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