Roundtable Discussion on Philippine and American Environmental Legislation and Jurisprudence : A Comparative Perspective (1992 : U.P. Law Center), Emmanuel, J. A., Ganapin, D. J., & Leonen, M. F. (1993). Philippine and American environmental legislation and jurisprudence: A comparative perspective. Institute of International Legal Studies, U.P. Law Center.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Roundtable Discussion on Philippine and American Environmental Legislation and Jurisprudence : A Comparative Perspective (1992 : U.P. Law Center), Jorge A. Emmanuel, Delfin J. Ganapin, و Marvic F. Leonen. Philippine and American Environmental Legislation and Jurisprudence: A Comparative Perspective. Quezon City: Institute of International Legal Studies, U.P. Law Center, 1993.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Roundtable Discussion on Philippine and American Environmental Legislation and Jurisprudence : A Comparative Perspective (1992 : U.P. Law Center), et al. Philippine and American Environmental Legislation and Jurisprudence: A Comparative Perspective. Institute of International Legal Studies, U.P. Law Center, 1993.