Cita APA (7a ed.)

Barlach, E., & Dross, F. (1969). 1925 - 1938. Piper.

Cita Chicago Style (17a ed.)

Barlach, Ernst, y Friedrich Dross. 1925 - 1938. München: Piper, 1969.

Cita MLA (8a ed.)

Barlach, Ernst, y Friedrich Dross. 1925 - 1938. Piper, 1969.