APA

Brecht B., Manheim R. & Willett J. (1990). Bertolt Brecht Letters. London: Methuen.

Chicago

Brecht Bertolt, Manheim Ralph and Willett John. 1990. Bertolt Brecht Letters. London: Methuen.

Harvard

Brecht B., Manheim R. and Willett J. (1990). Bertolt Brecht Letters. London: Methuen.

MLA

Brecht Bertolt, Manheim Ralph and Willett John. Bertolt Brecht Letters. London: Methuen. 1990.