Buenaventura, R. M., Manegdeg, F. G., & Cruz, I. E. Design of an effective producer gas cleaning method for a downdraft gasifier-engine-generator system. Philippine Engineering Journal.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Buenaventura, Ramon M., Ferdinand G. Manegdeg, و Ibarra E. Cruz. "Design of an Effective Producer Gas Cleaning Method for a Downdraft Gasifier-engine-generator System." Philippine Engineering Journal .
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Buenaventura, Ramon M., et al. "Design of an Effective Producer Gas Cleaning Method for a Downdraft Gasifier-engine-generator System." Philippine Engineering Journal, .
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.