Waldemar, W., Kartika, N., & Muawanah Robial, S. (2022). PRODUCTIVITY ANALYSIS OF FLOOR HERONING WORKERS USING WORK SAMPLING METHOD. Jurnal Pensil : Pendidikan Teknik Sipil, 11(2), 162–170. https://doi.org/10.21009/jpensil.v11i2.25474