Cita APA (7a ed.)

Gumplowicz, W. (1915). Russia and Poland during the present war. [s.n.].

Cita Chicago Style (17a ed.)

Gumplowicz, Władysław. Russia and Poland During the Present War. Lausanne: [s.n.], 1915.

Cita MLA (9a ed.)

Gumplowicz, Władysław. Russia and Poland During the Present War. [s.n.], 1915.