Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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