APA (7th ed.) Citation

Campbell, R. M., & Guthrie, L. F. (1975). A Continual Regrouping Program in Reading Readiness Skills for Kindergarten.

Chicago Style (17th ed.) Citation

Campbell, Ruby M., and Larry F. Guthrie. A Continual Regrouping Program in Reading Readiness Skills for Kindergarten. 1975.

MLA (9th ed.) Citation

Campbell, Ruby M., and Larry F. Guthrie. A Continual Regrouping Program in Reading Readiness Skills for Kindergarten. 1975.

Warning: These citations may not always be 100% accurate.