Viray, F. L. Development of data, models and techniques to determine optimal reliability level of electric power supply for the Philippines. Philippine Engineering Journal.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Viray, Francisco L. "Development of Data, Models and Techniques to Determine Optimal Reliability Level of Electric Power Supply for the Philippines." Philippine Engineering Journal .
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Viray, Francisco L. "Development of Data, Models and Techniques to Determine Optimal Reliability Level of Electric Power Supply for the Philippines." Philippine Engineering Journal, .
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.