Hutagalung, L., PURWANTO, A. and Prasetya, A. B. (2020) “The Five Leadership Style in Time of Pandemic Covid-19 throughout Industrial Revolution 4.0 as compared to Humane Leadership”, IJOSPOL - International Journal of Social, Policy and Law , 1(1), pp. 79-87. doi: 10.8888/ijospl.v1i1.21.