Cita APA (7a ed.)

Sandberg, V., & Herold, U. (1990). Berlin, 13. August 1990. Verlag Constructiv.

Cita Chicago Style (17a ed.)

Sandberg, Viola, y Ulrich Herold. Berlin, 13. August 1990. Berlin: Verlag Constructiv, 1990.

Cita MLA (8a ed.)

Sandberg, Viola, y Ulrich Herold. Berlin, 13. August 1990. Verlag Constructiv, 1990.