Cita APA (7th ed.)

Luft, F., & Kotschenreuther, H. (1991). Berliner Forum.

Cita Chicago (17th ed.)

Luft, Friedrich, i Hellmut Kotschenreuther. Berliner Forum. Berlin, 1991.

Cita MLA (8th ed.)

Luft, Friedrich, i Hellmut Kotschenreuther. Berliner Forum. 1991.