Tambunan, Samuel, 		Susilawati, Anita, AND 		Yohanes, Yohanes.
" Application of Quality Control Circle Method in Crusher Knife Reconditioning Products  (Case Study in PT. Andritz Pekanbaru)" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 64 Number 2 (30 July 2020)