“Development of PeCiKu TAHeS Educational Media (Hand Washing Habits and Short Nails for Grat and Healthy Children) to Increase Knowledge and Attitudes to Prevent Covid 19 at Tanjungsari 2 Elementary School, Blitar City”, josar, vol. 6, no. 2, pp. 298–312, Jun. 2021, doi: 10.35457/josar.v6i2.2068.