Cita APA (7th ed.)

Heilmeyer, W., & Schmidt, H. (1991). Berliner Forum.

Cita Chicago (17th ed.)

Heilmeyer, Wolf-Dieter, i Hartwig Schmidt. Berliner Forum. Berlin, 1991.

Cita MLA (8th ed.)

Heilmeyer, Wolf-Dieter, i Hartwig Schmidt. Berliner Forum. 1991.