Amhar Y, Faradiba SS, Abidin Z. ANALISIS TINGKAT KEBERHASILAN: HASIL VALIDASI BUKU TANGKAS MATEMATIKA 14 LEVEL. Histogram: j. pendidik. math. [Internet]. 2023 Sep. 30 [cited 2026 Jan. 16];7(2):133-41. Available from: https://journal.matappa.ac.id/index.php/histogram/article/view/3306