APA (7th ed.) Citation

Morton, R. L., Gray, M., Springstun, E., & Schaaf, W. L. (1955). Making Sure of Arithmetic. Silver Burdett Co..

Chicago Style (17th ed.) Citation

Morton, Robert Lee, Merle Gray, Elizabeth Springstun, and William L. Schaaf. Making Sure of Arithmetic. New York: Silver Burdett Co., 1955.

MLA (9th ed.) Citation

Morton, Robert Lee, et al. Making Sure of Arithmetic. Silver Burdett Co., 1955.