APA (7th ed.) Citation

Denny, E. H., & Kintz, G. M. (1930). Industrial safety training at mining school. [publisher not identified].

Chicago Style (17th ed.) Citation

Denny, Edward H., and G. M. Kintz. Industrial Safety Training at Mining School. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Denny, Edward H., and G. M. Kintz. Industrial Safety Training at Mining School. [publisher not identified], 1930.