Whiddett, S., & Hollyforde, S. (2003). A practical guide to competencies: How to enhance individual and organisational performance (Second edition.). Chartered Institute of Personnel and Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Whiddett, Steve, و Sarah Hollyforde. A Practical Guide to Competencies: How to Enhance Individual and Organisational Performance. Second edition. London: Chartered Institute of Personnel and Development, 2003.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Whiddett, Steve, و Sarah Hollyforde. A Practical Guide to Competencies: How to Enhance Individual and Organisational Performance. Second edition. Chartered Institute of Personnel and Development, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.