Marpaung R, Silalahi J, Napitupulu HS. Efforts to Improve the Ability of PKN Subject Teachers in the Use of Learning Aids Through the Implementation of Class Visit Supervision at Yunior High School Cerdas Mandiri. JSP [Internet]. 2024Jan.15 [cited 2024May11];7(1):74-3. Available from: https://jiped.org/index.php/JSP/article/view/548