↑Partington, J. R. (1949), An Advanced Treatise on Physical Chemistry., 1, Fundamental Principles. The Properties of Gases, London: Longmans, Green and Co., p. 122.
↑Çengel, Y. A., Boles, M. A. (2015). Thermodynamics: An Engineering Approach, 8th Ed, McGraw-Hill, New York. p. 340.