Olivia, Shara Sthella, Vita Purnamasari, and Cahaya Nugraheni. “The Effect of E-Booklet-Based Education on Preoperative Anxiety Among Patients Undergoing General Anesthesia at Queen Latifa General Hospital, Yogyakarta”. Jurnal EduHealth 16, no. 03 (August 25, 2025): 1374–1384. Accessed May 18, 2026. https://ejournal.seaninstitute.or.id/index.php/healt/article/view/7247.