APA (7th ed.) Citation

Helanko, R. (1960). On the small groups of school-age girls in Turku.

Chicago Style (17th ed.) Citation

Helanko, R. On the Small Groups of School-age Girls in Turku. Turku, 1960.

MLA (9th ed.) Citation

Helanko, R. On the Small Groups of School-age Girls in Turku. 1960.