Karamina, Sharfina, Thriwaty Arsal, and Tjaturahono Budi Sanjoto. 2019. “The Role of The Social Studies Teacher to Form Social Skills of Students in The Industry Era 4.0”. JESS (Journal of Educational Social Studies) 8 (2), 171-77. http://journal.unnes.ac.id./sju/jess/article/view/35595.