(1972). Pre-feasibility study of Davao-Calinan-Bukidnon road. Planning and Project Development Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pre-feasibility Study of Davao-Calinan-Bukidnon Road. Manila: Planning and Project Development Office, 1972.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Pre-feasibility Study of Davao-Calinan-Bukidnon Road. Planning and Project Development Office, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.