APA (7th ed.) Citation

Schrank, W. R., Graves, W. H., Harrell, R., McCulley, W. S., & Sittler, O. D. (1967). Relationships between ability grouping and academic achievement in the mathematics course at the United States Air Force Academy Preparatory School.

Chicago Style (17th ed.) Citation

Schrank, Wilburn Ronold, William H. Graves, Roger Harrell, William S. McCulley, and O. Dayle Sittler. Relationships Between Ability Grouping and Academic Achievement in the Mathematics Course at the United States Air Force Academy Preparatory School. [College Station, Tex.], 1967.

MLA (9th ed.) Citation

Schrank, Wilburn Ronold, et al. Relationships Between Ability Grouping and Academic Achievement in the Mathematics Course at the United States Air Force Academy Preparatory School. 1967.