Não informado. (1927). Psychological abstracts. American Psychological Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Psychological Abstracts. Lancaster, Pa: American Psychological Association, 1927.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Psychological Abstracts. American Psychological Association, 1927.
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