APA (7th ed.) Citation

Ohlhans, A. (1939). Elektrische Meßinstrumente. Bonness & Hachfeld.

Chicago Style (17th ed.) Citation

Ohlhans, Armin. Elektrische Meßinstrumente. Potsdam: Bonness & Hachfeld, 1939.

MLA (9th ed.) Citation

Ohlhans, Armin. Elektrische Meßinstrumente. Bonness & Hachfeld, 1939.

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