Cita APA (7a ed.)

Ruge, A. (1869). Paris im December 1851. [s.n.].

Cita Chicago Style (17a ed.)

Ruge, Arnold. Paris Im December 1851. Leipzig ; Heidelberg: [s.n.], 1869.

Cita MLA (9a ed.)

Ruge, Arnold. Paris Im December 1851. [s.n.], 1869.