Yunita, Widia, et al. “The Effectiveness of Project-Based Learning through Vlog to Improve Pre-Schoolers’ Vocabulary Mastery”. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini, vol. 6, no. 5, June 2022, pp. 4661-8, doi:10.31004/obsesi.v6i5.2232.