APA (7th ed.) Citation

Harrington, D. (1928). Hazards in connection with concentrated coal mining. [publisher not identified].

Chicago Style (17th ed.) Citation

Harrington, D. Hazards in Connection with Concentrated Coal Mining. Washington, D.C.: [publisher not identified], 1928.

MLA (9th ed.) Citation

Harrington, D. Hazards in Connection with Concentrated Coal Mining. [publisher not identified], 1928.