Cita APA (7a ed.)

Freiligrath, F. (1842). Karl Immermann. [s.n.].

Cita Chicago Style (17a ed.)

Freiligrath, Ferdinand. Karl Immermann. Stuttgart: [s.n.], 1842.

Cita MLA (9a ed.)

Freiligrath, Ferdinand. Karl Immermann. [s.n.], 1842.