Cita APA (7a ed.)

Obermann, H. (1999). Wetter. Westermann.

Cita Chicago Style (17a ed.)

Obermann, Helmut. Wetter. Braunschweig: Westermann, 1999.

Cita MLA (9a ed.)

Obermann, Helmut. Wetter. Westermann, 1999.