APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Thor, Carl G., and William F. Christopher. Handbook for Productivity Measurement and Improvement. Cambridge, Massachusetts [etc.]: Productivity press, 1993.

MLA (9th ed.) Citation

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