APA (7th ed.) Citation

Christopher, W. F., & Thor, C. G. (1993). Handbook for productivity measurement and improvement. Productivity.

Chicago Style (17th ed.) Citation

Christopher, William F., and Carl G. Thor. Handbook for Productivity Measurement and Improvement. Portland, Oregon: Productivity, 1993.

MLA (9th ed.) Citation

Christopher, William F., and Carl G. Thor. Handbook for Productivity Measurement and Improvement. Productivity, 1993.