Cita APA (7a ed.)

Gregorovius, F. (1856). Figuren . [s.n.].

Cita Chicago Style (17a ed.)

Gregorovius, Ferdinand. Figuren . Leipzig: [s.n.], 1856.

Cita MLA (9a ed.)

Gregorovius, Ferdinand. Figuren . [s.n.], 1856.