Cita APA (7a ed.)

Gerke, F. C. (1840). Zeus. [s.n.].

Cita Chicago Style (17a ed.)

Gerke, Friedrich Clemens. Zeus. Altona: [s.n.], 1840.

Cita MLA (9a ed.)

Gerke, Friedrich Clemens. Zeus. [s.n.], 1840.