Gravells, A. (2016). Principles and practices of assessment: A guide for assessors in the FE and skills sector (Third edition.). SAGE ; Learning Matters.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gravells, Ann. Principles and Practices of Assessment: A Guide for Assessors in the FE and Skills Sector. Third edition. Los Angeles ; London: SAGE ; Learning Matters, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Gravells, Ann. Principles and Practices of Assessment: A Guide for Assessors in the FE and Skills Sector. Third edition. SAGE ; Learning Matters, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.