Não informado. (1997). Reference & User Services Quarterly. American Library Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Reference & User Services Quarterly. Chicago, Ill: American Library Association, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Reference & User Services Quarterly. American Library Association, 1997.
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