Astuti, Erna, Nining Sugihartini, Zainab Zainab, and Putri Rachma Novitasari. “Community Service Based on A Training Method for Making Liquid Hand Sanitizers to Prevent The Spread of COVID-19 in Tegalsari Kulon Progo”. SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) 4, no. 1 (June 12, 2023). Accessed May 15, 2024. http://journal2.uad.ac.id/index.php/spekta/article/view/7821.