APA način citiranja

National Productivity Board and National Productivity Association. (1986). Productivity digest (Singapore). Singapore: National Productivity Board and National Productivity Association.

Čikaški stil citiranja

National Productivity Board and National Productivity Association. Productivity Digest (Singapore). Singapore: National Productivity Board and National Productivity Association, 1986.

MLA način citiranja

National Productivity Board and National Productivity Association. Productivity Digest (Singapore). Singapore: National Productivity Board and National Productivity Association, 1986.