source:Source: https://www.researchgate.net/profile/Rahmat-Nurcahyo/publication/343871109_Total_Quality_Management_Implementation_in_Small_Business_Case_Study_in_Depok_Indonesia/links/5f8e852a92851c14bcd551b0/Total-Quality-Management-Implementation-in-Small-Business-Case-Study-in-Depok-Indonesia.pdf
