Cita APA (7a ed.)

Keun, I. (1955). Grown-ups don't understand ([1st published].). Parrish.

Cita Chicago Style (17a ed.)

Keun, Irmgard. Grown-ups Don't Understand. [1st published]. London: Parrish, 1955.

Cita MLA (9a ed.)

Keun, Irmgard. Grown-ups Don't Understand. [1st published]. Parrish, 1955.