Cita APA (7th ed.)

Portikus Frankfurt am Main & Kölle, B. (1997). Portikus Frankfurt am Main 1987-1997.

Cita Chicago (17th ed.)

Portikus Frankfurt am Main i Brigitte Kölle. Portikus Frankfurt Am Main 1987-1997. Frankfurt am Main, 1997.

Cita MLA (8th ed.)

Portikus Frankfurt am Main i Brigitte Kölle. Portikus Frankfurt Am Main 1987-1997. 1997.