Cienciala, E. (1994). Sap flow, transpiration, and water use efficiency of spruce and willow in relation to climatic factors. Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cienciala, Emil. Sap Flow, Transpiration, and Water Use Efficiency of Spruce and Willow in Relation to Climatic Factors. Uppsala: Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Cienciala, Emil. Sap Flow, Transpiration, and Water Use Efficiency of Spruce and Willow in Relation to Climatic Factors. Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research, 1994.
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