American Association for Higher Education, Harkavy, I. R., & Donovan, B. M. (2005). Connecting past and present: Concepts and models for service-learning in history. Stylus.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)American Association for Higher Education, Ira Richard Harkavy, و Bill M. Donovan. Connecting Past and Present: Concepts and Models for Service-learning in History. Sterling, Virginia: Stylus, 2005.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)American Association for Higher Education, et al. Connecting Past and Present: Concepts and Models for Service-learning in History. Stylus, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.