APA (7th ed.) Citation

U.S. Bureau of Labor Statistics, Searle, A. D., & Kaplan, C. S. (1949). Major sources of productivity information.

Chicago Style (17th ed.) Citation

U.S. Bureau of Labor Statistics, Allan D. Searle, and Catherine S. Kaplan. Major Sources of Productivity Information. Washington, 1949.

MLA (9th ed.) Citation

U.S. Bureau of Labor Statistics, et al. Major Sources of Productivity Information. 1949.