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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Psychological Association. Publication Manual of the American Psychological Association. quinta edición. Washington D.C: American Psychological Association, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAmerican Psychological Association. Publication Manual of the American Psychological Association. quinta edición. American Psychological Association, 2002.
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