APA (7th ed.) Citation

Gregory, C. A., & Renfrow, O. W. (1929). Statistical method in education and psychology. C.A. Gregory.

Chicago Style (17th ed.) Citation

Gregory, Chester Arthur, and Omer W. Renfrow. Statistical Method in Education and Psychology. Cincinnati: C.A. Gregory, 1929.

MLA (9th ed.) Citation

Gregory, Chester Arthur, and Omer W. Renfrow. Statistical Method in Education and Psychology. C.A. Gregory, 1929.