Dixon, V. D. (1991). A study of change: Principals as facilitators and teachers as implementors during year one innovation. Columbia University Teachers College.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dixon, Virginia Dolores. A Study of Change: Principals as Facilitators and Teachers as Implementors During Year One Innovation. Columbia: Columbia University Teachers College, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Dixon, Virginia Dolores. A Study of Change: Principals as Facilitators and Teachers as Implementors During Year One Innovation. Columbia University Teachers College, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.