Siahaan, Makhmul Ikhsan, dan Elly Rosmaini. 2022. “Use of Classification and Regression Tree (CART) Method for Classification of Labor Force Participation Levels in Medan City in 2019”. FARABI: Jurnal Matematika Dan Pendidikan Matematika 5 (2):95-103. https://doi.org/10.47662/farabi.v5i2.386.