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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Association of Applied Psychology. Applied Psychology. East Sussex, Inglaterra: Psychology Press, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInternational Association of Applied Psychology. Applied Psychology. Psychology Press, 1987.
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