Lusiana, Lusiana, Hartati Hartati, and Silvi Aryanti. 2021. “Analysis of the Need for Development of Textbooks for Android-Based Physical Education Learning Planning Courses”. Prosiding Seminar Nasional Pendidikan Jasmani Dan Kesehatan 1 (1), 356-62. http://ejournal.fkip.unsri.ac.id/index.php/semnaspenjas/article/view/224.