Rismana, . S.L. et al. 2020. The Effectiveness of Combination Toothbrushing Techniques on Oral Hygiene Index (PHP-M) in Pre-School Children at Harapan Indah Kindergarten, Pontianak: Efektifitas Teknik Menyikat Gigi Kombinasi Terhadap Indeks Kebersihan Mulut (PHP-M) Pada Anak Pra-Sekolah Di TK Harapan Indah Pontianak. Dental Therapist Journal. 2, 2 (Nov. 2020), 44–54. DOI:https://doi.org/10.31965/dtj.v2i2.713.