APA (7th ed.) Citation

Kehl, J. E. (1928). New consolidation in German clock and watch industry. [publisher not identified].

Chicago Style (17th ed.) Citation

Kehl, John E. New Consolidation in German Clock and Watch Industry. Washington, D.C.: [publisher not identified], 1928.

MLA (9th ed.) Citation

Kehl, John E. New Consolidation in German Clock and Watch Industry. [publisher not identified], 1928.