1.
Sapto Hariyono, Sujoko, Nur Wening. CERTIFICATION OF CLEANLINESS, HEALTH, SAFETY AND ENVIRONMENTAL SUSTAINABILITY AS RESEARCH AND DEVELOPMENT OPPORTUNITIES IN VARIOUS FIELDS OF BUSINESS SERVICES: A LITERATURE REVIEW. IJITSS. 2022;(2(34). doi:10.31435/rsglobal_ijitss/30062022/7812