Não informado. (1990). Personnel Training and Education. Library Association, Personnel Training and Education Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Personnel Training and Education. London: Library Association, Personnel Training and Education Group, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Personnel Training and Education. Library Association, Personnel Training and Education Group, 1990.
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