Ernawati, E., T. P. Handayani, R. Y. Astari, H. Ahmar, and I. Mauludiyah. “Communication, Information & Education Online-Based Assisted Booklets in COVID-19 Prevention: Study on Maternals”. International Journal of Health Sciences, vol. 6, no. S1, Apr. 2022, pp. 2957-64, doi:10.53730/ijhs.v6nS1.5096.