APA (7th ed.) Citation

Ash, S. H. (1930). Electrical blasting practice at some coal mines in State of Washington. [publisher not identified].

Chicago Style (17th ed.) Citation

Ash, S. H. Electrical Blasting Practice at Some Coal Mines in State of Washington. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Ash, S. H. Electrical Blasting Practice at Some Coal Mines in State of Washington. [publisher not identified], 1930.