Não informado. (2004). Quality assurance. Institute of Quality Assurance.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Quality Assurance. London: Institute of Quality Assurance, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Quality Assurance. Institute of Quality Assurance, 2004.
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