Ratnaningsih, Indri Apriyani, Niken Larasati, Riswanto, and Yuli Kurniasih. PSIKOLOGI KELAS (Membangun Lingkungan Belajar Yang Ramah Anak). PT. Ghani Press Group, 2026. Accessed July 22, 2026. https://e-book.ghanipress.com/index.php/ghanipress/catalog/book/62.