APA (7th ed.) Citation

Schoenfelder, H. (1981). Müssen Kinder schwierig sein?

Chicago Style (17th ed.) Citation

Schoenfelder, Harri. Müssen Kinder Schwierig Sein? 1981.

MLA (9th ed.) Citation

Schoenfelder, Harri. Müssen Kinder Schwierig Sein? 1981.

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