De La Cruz, D. S. (2000). Integration of Environmental Education for Sustainable Agriculture: Status in Tertiary Institutions and Guidelines for Institutional Policies and Curriculum Management.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)De La Cruz, Dina S. Integration of Environmental Education for Sustainable Agriculture: Status in Tertiary Institutions and Guidelines for Institutional Policies and Curriculum Management. 2000.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)De La Cruz, Dina S. Integration of Environmental Education for Sustainable Agriculture: Status in Tertiary Institutions and Guidelines for Institutional Policies and Curriculum Management. 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.