Yunita, W. et al. 2022. The Effectiveness of Project-Based Learning through Vlog to Improve Pre-Schoolers’ Vocabulary Mastery. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini. 6, 5 (Jun. 2022), 4661–4668. DOI:https://doi.org/10.31004/obsesi.v6i5.2232.