Cita APA (7a ed.)

Heyden, F. A. v. (1818). Conradin. [s.n.].

Cita Chicago Style (17a ed.)

Heyden, Friedrich August von. Conradin. Berlin: [s.n.], 1818.

Cita MLA (9a ed.)

Heyden, Friedrich August von. Conradin. [s.n.], 1818.