Olivia, Shara Sthella, Vita Purnamasari, and Cahaya Nugraheni. 2025. “The Effect of E-Booklet-Based Education on Preoperative Anxiety Among Patients Undergoing General Anesthesia at Queen Latifa General Hospital, Yogyakarta”. Jurnal EduHealth 16 (03):1374-84. https://ejournal.seaninstitute.or.id/index.php/healt/article/view/7247.