Indrayani, Kadek Diah, et al. “Analisis Yuridis Terhadap Praktik Jual Beli Surat Keterangan Sakit Tanpa Validasi Dokter Melalui E-Commerce ”. Jurnal Preferensi Hukum, vol. 5, no. 3, Feb. 2025, pp. 314-9, https://www.ejournal.warmadewa.ac.id/index.php/juprehum/article/view/11458.