Noyumala, N., A. Asriadi, and S. wahyuni Bahrum. “Kecemasan Lansia Berhubungan Dengan Kejadian Insomnia Dimasa Pandemi Covid-19”. Jurnal Ilmiah Permas: Jurnal Ilmiah STIKES Kendal, vol. 12, no. 3, July 2022, pp. 569-74, https://journal2.stikeskendal.ac.id/index.php/PSKM/article/view/235.