WASET
    Donald C. Lantu and  Henndy Ginting and  M. Yorga Permana and  Dany M. A. Ramdlany,  Evaluating the Effectiveness of the Use of Scharmer’s Theory-U Model in Action-Learning-Based Leadership Development Program.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 137(5). 661 - 664
    [viewed 02 May 2024]. Available from: https://publications.waset.org/pdf/10009277.