Cita APA (7a ed.)

Haack, H. (1905). Geographen-Kalender 1905-1906. Justus Perthes.

Cita Chicago Style (17a ed.)

Haack, Hermann. Geographen-Kalender 1905-1906. Gotha: Justus Perthes, 1905.

Cita MLA (9a ed.)

Haack, Hermann. Geographen-Kalender 1905-1906. Justus Perthes, 1905.