Workayehu, T. (2005). Effect of Cofee Residue and Cropping System on Crop Yield and Physicochemical Properties of the Soil in Southern Ethiopia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Workayehu, Tenaw. Effect of Cofee Residue and Cropping System on Crop Yield and Physicochemical Properties of the Soil in Southern Ethiopia. 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Workayehu, Tenaw. Effect of Cofee Residue and Cropping System on Crop Yield and Physicochemical Properties of the Soil in Southern Ethiopia. 2005.
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