APA (7th ed.) Citation

(1972). Prof. Dr.-Ing. Siegfried Balke, 70 Jahre.

Chicago Style (17th ed.) Citation

Prof. Dr.-Ing. Siegfried Balke, 70 Jahre. 1972.

MLA (9th ed.) Citation

Prof. Dr.-Ing. Siegfried Balke, 70 Jahre. 1972.

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