Oktaviyanthi, Rina, and Ria Noviana Agus. “Guided Worksheet Formal Definition of Limit: An Instrument Development Process”. AL-ISHLAH: Jurnal Pendidikan 13, no. 1 (June 1, 2021): 449–461. Accessed November 8, 2026. https://journal.staihubbulwathan.id/alishlah/article/view/483.