APA (7th ed.) Citation

Heldt P. M. (1923). Automobilbau (6. Aufl.). R.C. Schmidt.

Chicago Style (17th ed.) Citation

Heldt P. M. Automobilbau. 6. Aufl. Berlin: R.C. Schmidt, 1923.

MLA (8th ed.) Citation

Heldt P. M. Automobilbau. 6. Aufl. R.C. Schmidt, 1923.

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