Gravells, A. (2016). Principles & practices of quality assurance: A guide for internal and external quality assurers in the FE and skills sector. Learning Matters.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGravells, Ann. Principles & Practices of Quality Assurance: A Guide for Internal and External Quality Assurers in the FE and Skills Sector. SAGE: Learning Matters, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGravells, Ann. Principles & Practices of Quality Assurance: A Guide for Internal and External Quality Assurers in the FE and Skills Sector. Learning Matters, 2016.
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