APA (7th ed.) Citation

(1976). Cologne cathedral: Color photo-guide to cathedral and town. Verlag Gertrud Ziethen.

Chicago Style (17th ed.) Citation

Cologne Cathedral: Color Photo-guide to Cathedral and Town. [Place of publication not identified]: Verlag Gertrud Ziethen, 1976.

MLA (9th ed.) Citation

Cologne Cathedral: Color Photo-guide to Cathedral and Town. Verlag Gertrud Ziethen, 1976.

Warning: These citations may not always be 100% accurate.