“Relationship of Parent’s Knowledge About Toilet Training with the Ability of 1 - 5 Years Agency in Conducting Toilet Training in the Ibnu Sina Kids, Pekanbaru City”, JPK : Jurnal Proteksi Kesehatan, vol. 8, no. 2, pp. 35–43, Dec. 2019, doi: 10.36929/jpk.v8i2.163.