Não informado. (1972). Forestry digest. University of the Philippines, College of Forestry, Department of Forestry.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Forestry Digest. Laguna, Filipinas: University of the Philippines, College of Forestry, Department of Forestry, 1972.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Forestry Digest. University of the Philippines, College of Forestry, Department of Forestry, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.