M. N. Antono and W. Lutfitasari, Mendampingi Tanpa Mengambil Alih Strategi Shadow Teacher dalam Mengembangkan Bahasa PDBK. PT. Ghani Press Group, 2026. Accessed: Oct. 23, 2026. [Online]. Available: https://e-book.ghanipress.com/index.php/ghanipress/catalog/book/137