توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Cruz, R. (1997). Watershed management and food security in the Philippines: Policy issues and concerns. Center for Policy and Development Studies, University of the Philippines at Los Baños.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Cruz, R.V.O. Watershed Management and Food Security in the Philippines: Policy Issues and Concerns. College, Laguna: Center for Policy and Development Studies, University of the Philippines at Los Baños, 1997.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Cruz, R.V.O. Watershed Management and Food Security in the Philippines: Policy Issues and Concerns. Center for Policy and Development Studies, University of the Philippines at Los Baños, 1997.