Eleutherian Mills-Hagley Foundation & Porter, G. (1976). Regional economic history: The Mid-Atlantic area since 1700: proceedings of a conference sponsored by the Eleutheran Mills- Hagley Foundation, December 11-12, 1975. Eleutheran Mills-Hagley Foundation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Eleutherian Mills-Hagley Foundation و Glenn Porter. Regional Economic History: The Mid-Atlantic Area Since 1700: Proceedings of a Conference Sponsored by the Eleutheran Mills- Hagley Foundation, December 11-12, 1975. Greenville, Delaware: Eleutheran Mills-Hagley Foundation, 1976.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Eleutherian Mills-Hagley Foundation و Glenn Porter. Regional Economic History: The Mid-Atlantic Area Since 1700: Proceedings of a Conference Sponsored by the Eleutheran Mills- Hagley Foundation, December 11-12, 1975. Eleutheran Mills-Hagley Foundation, 1976.