APA (7th ed.) Citation

Gruhn, W. T., & Douglass, H. R. (1956). The modern junior high school (2d ed.). Ronald Press Co..

Chicago Style (17th ed.) Citation

Gruhn, William Theodore, and Harl R. Douglass. The Modern Junior High School. 2d ed. New York: Ronald Press Co., 1956.

MLA (9th ed.) Citation

Gruhn, William Theodore, and Harl R. Douglass. The Modern Junior High School. 2d ed. Ronald Press Co., 1956.