Cita APA (7th ed.)

Beckmann, M., & Schneede, U. M. (1993). Briefe. Piper.

Cita Chicago (17th ed.)

Beckmann, Max, i Uwe M. Schneede. Briefe. München [u.a.]: Piper, 1993.

Cita MLA (8th ed.)

Beckmann, Max, i Uwe M. Schneede. Briefe. Piper, 1993.