Librero, A. D., & Lameyra, Z. C. (1991). The State of Philippine upland research: Profile and annotated bibliography. Institute of Environmental Science and Management, University of the Philippines at Los Banos.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Librero, Araceli D., و Zosima C. Lameyra. The State of Philippine Upland Research: Profile and Annotated Bibliography. College, Los Banos: Institute of Environmental Science and Management, University of the Philippines at Los Banos, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Librero, Araceli D., و Zosima C. Lameyra. The State of Philippine Upland Research: Profile and Annotated Bibliography. Institute of Environmental Science and Management, University of the Philippines at Los Banos, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.