Cita APA (7th ed.)

Klengel-Brandt, E., & Marzahn, J. (1983). Sumer (o.A.). o.A..

Cita Chicago (17th ed.)

Klengel-Brandt, E., i J. Marzahn. Sumer. o.A. Berlin: o.A., 1983.

Cita MLA (8th ed.)

Klengel-Brandt, E., i J. Marzahn. Sumer. o.A. o.A., 1983.