APA (7th ed.) Citation

Paul, J. W. (1932). How to prevent death and injury from falls of roof in coal mines. [publisher not identified].

Chicago Style (17th ed.) Citation

Paul, J. W. How to Prevent Death and Injury from Falls of Roof in Coal Mines. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Paul, J. W. How to Prevent Death and Injury from Falls of Roof in Coal Mines. [publisher not identified], 1932.