Nubatonis, Wasty Tabita, and Surja Permana. “The Professionalism Of Teachers In Public Elementary School State Of West Perak, VI No 494, Dolphin Street No. 29 City Of Surabaya”. Jurnal Didaskalia, vol. 4, no. 2, Oct. 2021, pp. 1-7, doi:10.33856/didaskalia.v4i2.214.