5 BAHAN BAKU PERCAYA DIRI: (SELF CONFIDENCE: The Foundation Of Life Skill Intelligence). PENERBIT KARYA BAKTI MAKMUR (KBM) INDONESIA, 2025. Diakses: 2 Oktober 2026. [Daring]. Tersedia pada: https://librarypenerbitkbm.science/index.php/buku/catalog/book/189