APA (7th ed.) Citation

Koos, L. V. (1927). The junior high school (Enlarged edition.). Ginn.

Chicago Style (17th ed.) Citation

Koos, Leonard V. The Junior High School. Enlarged edition. Boston: Ginn, 1927.

MLA (9th ed.) Citation

Koos, Leonard V. The Junior High School. Enlarged edition. Ginn, 1927.

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