APA (7th ed.) Citation

Harrington, D., & Howell, S. P. (1929). Hazards in use of delay-action detonators in coal mines. [publisher not identified].

Chicago Style (17th ed.) Citation

Harrington, D., and S. P. Howell. Hazards in Use of Delay-action Detonators in Coal Mines. Washington, D.C.: [publisher not identified], 1929.

MLA (9th ed.) Citation

Harrington, D., and S. P. Howell. Hazards in Use of Delay-action Detonators in Coal Mines. [publisher not identified], 1929.