Wahl, H., C. Kaufmann, F. Eckkrammer, A. Mense, H. Gollner, C. Himmler, W. Rogner, T. Baierl, and R. Slobodian. “Soft Skills In Practice And In Education: An Evaluation”. American Journal of Business Education (AJBE), vol. 5, no. 2, Feb. 2012, pp. 225-32, doi:10.19030/ajbe.v5i2.6826.