AMALINDA, Khassani Nur; WIDYASARI, Choiriyah. Efektivitas Buku Ajar Happy Thinking Unit II My Family untuk Meningkatkan Kosa Kata Awal Anak Usia Dini. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini, [S. l.], v. 6, n. 5, p. 5103–5112, 2022. DOI: 10.31004/obsesi.v6i5.2786. Disponível em: https://obsesi.or.id/index.php/obsesi/article/view/2786. Acesso em: 10 oct. 2026.