1. Information on https://www.dosm.gov.my/v1/index.php?r=column/pdfPrev&id=VVEzb0RkOEZtWUlodG5oVGZYZnFIUT09
2. Information on https://www.thestar.com.my/news/nation/2021/06/28/covid-19-number-of-cases-from-manufacturing-sector-factories-still-small-says-azmin
3. UNDERSTANDING THE EFFECTS OF INTERPERSONAL COMMUNICATION AND TASK DESIGN ON JOB PERFORMANCE AMONG EMPLOYEES IN THE MANUFACTURING COMPANY
4. M. Armstrong and A. Baron “Managing Performance: Performance management in action”, (CIPD, London, 2004).
5. M. Armstrong Baron “Performance Management: Key Strategies and Management Guideline” (Thomson-Shore, Inc, USA, 2006).