Cita APA (7a ed.)

Freytag, H. (1919). Thorn a German city. [s.n.].

Cita Chicago Style (17a ed.)

Freytag, Hermann. Thorn a German City. Danzig: [s.n.], 1919.

Cita MLA (9a ed.)

Freytag, Hermann. Thorn a German City. [s.n.], 1919.