Grey, I. M., McClean, B., & McCraken, M. (2007). An evaluation of positive behavioural support for people with very severe challenging behaviours in community-based settings.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Grey, Ian M., Brian McClean, و Margaret McCraken. An Evaluation of Positive Behavioural Support for People with Very Severe Challenging Behaviours in Community-based Settings. 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Grey, Ian M., et al. An Evaluation of Positive Behavioural Support for People with Very Severe Challenging Behaviours in Community-based Settings. 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.