APA (7th ed.) Citation

Forbes, W. H. (1930). Accident prevention in coal mining. [publisher not identified].

Chicago Style (17th ed.) Citation

Forbes, W. H. Accident Prevention in Coal Mining. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Forbes, W. H. Accident Prevention in Coal Mining. [publisher not identified], 1930.