Cita APA (7a ed.)

Beethoven, L. v. (1855). Beethoven. [s.n.].

Cita Chicago Style (17a ed.)

Beethoven, Ludwig van. Beethoven. Cassel ; Hamburg: [s.n.], 1855.

Cita MLA (9a ed.)

Beethoven, Ludwig van. Beethoven. [s.n.], 1855.