توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Edited by Folmer , H., & Ulen , T. S. (1996). Environmental policy with political and economic integration: The European Union and the United States. Edward Elgar.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Edited by Folmer , Henk, و Thomas S. Ulen. Environmental Policy with Political and Economic Integration: The European Union and the United States. Clheltenham: Edward Elgar, 1996.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Edited by Folmer , Henk, و Thomas S. Ulen. Environmental Policy with Political and Economic Integration: The European Union and the United States. Edward Elgar, 1996.