Fadlil Yani Ainusyamsi *, Husni Husni. Building ‘Tough Student Character’ through Optimization of Spiritual and Emotional Intelligence: An Action Research. IJAST [Internet]. 2020Jun.1 [cited 2024May5];29(06):8573-81. Available from: http://sersc.org/journals/index.php/IJAST/article/view/25306