National Productivity Board and National Productivity Association. (1982). Productivity digest (Singapore). Singapore: National Productivity Board and National Productivity Association.
Chicago Style CitationNational Productivity Board and National Productivity Association. Productivity Digest (Singapore). Singapore: National Productivity Board and National Productivity Association, 1982.
MLA CitationNational Productivity Board and National Productivity Association. Productivity Digest (Singapore). Singapore: National Productivity Board and National Productivity Association, 1982.
Warning: These citations may not always be 100% accurate.