WĄSIKIEWICZ-RUSNAK U. INTEGRATED MANAGEMENT OF THE ISO 9000, ISO 14000 AND PN-N 18001 SYSTEMS OF STANDARDS AT A SELECTED ENTERPRISE. ees [Internet]. 2021 Jun. 17 [cited 2024 Nov. 22];11:203-9. Available from: https://czasopisma.uni.opole.pl/index.php/ees/article/view/4166