Singh, H. M. (1979). Psychological study of the experimenter's effects on the performance of the subject. National Psychological Corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSingh, Har Mohan. Psychological Study of the Experimenter's Effects on the Performance of the Subject. National Psychological Corporation, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSingh, Har Mohan. Psychological Study of the Experimenter's Effects on the Performance of the Subject. National Psychological Corporation, 1979.
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