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.