Philippines. Regional Development Council, Region II, & Philippines. National Economic and Development Authority. (2004). Region II: Cagayan Valley regional development investment program, 2005-2010. National Economic and Development Authority.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. Regional Development Council, Region II, و Philippines. National Economic and Development Authority. Region II: Cagayan Valley Regional Development Investment Program, 2005-2010. Tuguegarao City, Cagayan: National Economic and Development Authority, 2004.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. Regional Development Council, Region II, و Philippines. National Economic and Development Authority. Region II: Cagayan Valley Regional Development Investment Program, 2005-2010. National Economic and Development Authority, 2004.