Waldemar W, Kartika N, Muawanah Robial S. PRODUCTIVITY ANALYSIS OF FLOOR HERONING WORKERS USING WORK SAMPLING METHOD. jpensil [Internet]. 2022May21 [cited 2025May9];11(2):162 -170. Available from: http://103.8.12.212:33180/unj/index.php/jpensil/article/view/25474