AMHAR, Yusuf; FARADIBA, Surya Sari; ABIDIN, Zainal. ANALISIS TINGKAT KEBERHASILAN: HASIL VALIDASI BUKU TANGKAS MATEMATIKA 14 LEVEL. HISTOGRAM: Jurnal Pendidikan Matematika, [S. l.], v. 7, n. 2, p. 133–141, 2023. DOI: 10.31100/histogram.v7i2.3306. Disponível em: https://journal.matappa.ac.id/index.php/histogram/article/view/3306. Acesso em: 14 jan. 2026.