APA (7th ed.) Citation

Gruhn, W. T., & Douglass, H. R. (1947). The modern junior high school. Ronald Press Co.

Chicago Style (17th ed.) Citation

Gruhn, William Theodore, and Harl Roy Douglass. The Modern Junior High School. New York: Ronald Press Co, 1947.

MLA (9th ed.) Citation

Gruhn, William Theodore, and Harl Roy Douglass. The Modern Junior High School. Ronald Press Co, 1947.

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