APA (7th ed.) Citation

Wollan, K. I. (1937). A group approach to the study and treatment of problem boys.

Chicago Style (17th ed.) Citation

Wollan, Kenneth Ingvald. A Group Approach to the Study and Treatment of Problem Boys. 1937.

MLA (9th ed.) Citation

Wollan, Kenneth Ingvald. A Group Approach to the Study and Treatment of Problem Boys. 1937.

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