Siahaan, G., M. Manalu, Rumida, R. S. Ginting, A. Manurung, L. Sihombing, F. Farida, and A. R. Akmal. “Counselling and Training of Nutritional Snacks Making for Immunity Increasing During Covid 19 Pandemic”. Journal of Saintech Transfer, vol. 5, no. 2, Jan. 2023, pp. 102-9, doi:10.32734/jst.v5i2.11065.