Ya-Hui Lee and  Chien-Hung Hsieh and  Ching-Yi Lu,  The Study of the Correlation of Proactive Coping and Retirement Planning: An Example of Senior Civil Servants in Taiwan.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2014, vol. 90(6). 1827 - 1830
    [viewed 25 May 2020]. Available from: https://publications.waset.org/pdf/9998579.