APA-Zitierstil (7. Ausg.)

Valentine, C. W. (1940). The difficult child and the problem of discipline (1. publ.). Methuen.

Chicago-Zitierstil (17. Ausg.)

Valentine, Charles W. The Difficult Child and the Problem of Discipline. 1. publ. London: Methuen, 1940.

MLA-Zitierstil (9. Ausg.)

Valentine, Charles W. The Difficult Child and the Problem of Discipline. 1. publ. Methuen, 1940.