Cudia, K. J. C., & De Leon, P. (2014). An assessment of the effectiveness of the agricultural extension system in the Philippines: A case study of the LGU extension in Magalang, Pampanga. University of the Philippines Diliman Extension Program in Pampanga.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cudia, Krisnah Joy C., و Patrick De Leon. An Assessment of the Effectiveness of the Agricultural Extension System in the Philippines: A Case Study of the LGU Extension in Magalang, Pampanga. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2014.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cudia, Krisnah Joy C., و Patrick De Leon. An Assessment of the Effectiveness of the Agricultural Extension System in the Philippines: A Case Study of the LGU Extension in Magalang, Pampanga. University of the Philippines Diliman Extension Program in Pampanga, 2014.