Tria, A. M. (1975). SSRU transportation inventory of the Bicol River Basin as of January 1974. Social Survey Research Unit, Bicol River Basin Development Program.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tria, Agapito M. SSRU Transportation Inventory of the Bicol River Basin as of January 1974. [Camarines Sur]: Social Survey Research Unit, Bicol River Basin Development Program, 1975.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Tria, Agapito M. SSRU Transportation Inventory of the Bicol River Basin as of January 1974. Social Survey Research Unit, Bicol River Basin Development Program, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.