Qatrunnada, N., and Mira. “The Importance Of Breakfast And Eating Nutritious Foods For Children As Efforts To Increase Immunity In The Covid-19 Pandemic Era”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 369-72, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/186.