Cita APA (7a ed.)

Barlach, E., & Dross, F. (1968). 1888 - 1924. Piper.

Cita Chicago Style (17a ed.)

Barlach, Ernst, y Friedrich Dross. 1888 - 1924. München: Piper, 1968.

Cita MLA (8a ed.)

Barlach, Ernst, y Friedrich Dross. 1888 - 1924. Piper, 1968.