HANIFAH, Hanifah; WIDYASARI, Choiriyah. Buku Ajar Happy Thinking: Alternatif untuk Meningkatkan Kosa Kata Anak Usia Dini. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini, [S. l.], v. 7, n. 3, p. 2721–2732, 2023. DOI: 10.31004/obsesi.v7i3.4258. Disponível em: https://obsesi.or.id/index.php/obsesi/article/view/4258. Acesso em: 29 sep. 2026.