Durano, F. L. A., Alviola, P. A., IV, Digal, L. N., Oponda, N. B., & Sarmiento, J. M. P. (2019). The effects of altitude on the profitability, productivity, and technical efficiency of cacao farms in Calinan and Marilog Districts, Davao City, Philippines. Banwa.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Durano, Francis Levi A., Pedro A. Alviola, IV, Larry N. Digal, Nilo B. Oponda, و Jon Marx P. Sarmiento. "The Effects of Altitude on the Profitability, Productivity, and Technical Efficiency of Cacao Farms in Calinan and Marilog Districts, Davao City, Philippines." Banwa 2019.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Durano, Francis Levi A., et al. "The Effects of Altitude on the Profitability, Productivity, and Technical Efficiency of Cacao Farms in Calinan and Marilog Districts, Davao City, Philippines." Banwa, 2019.