Sipus, R. G. (1977). Perceptions of leadership among student leaders, their peers and teachers. Arizona State University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sipus, Ronald G. Perceptions of Leadership Among Student Leaders, Their Peers and Teachers. Tempe, Arizona: Arizona State University, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sipus, Ronald G. Perceptions of Leadership Among Student Leaders, Their Peers and Teachers. Arizona State University, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.