Ratnaningsih, I. Apriyani, N. Larasati, Riswanto, and Y. Kurniasih, PSIKOLOGI KELAS (Membangun Lingkungan Belajar yang Ramah Anak). PT. Ghani Press Group, 2026. Accessed: Jul. 22, 2026. [Online]. Available: https://e-book.ghanipress.com/index.php/ghanipress/catalog/book/62