APA (7th ed.) Citation

Paul, J. W. (1927). How are men killed in mines by falls of roof and coal. [publisher not identified].

Chicago Style (17th ed.) Citation

Paul, J. W. How Are Men Killed in Mines by Falls of Roof and Coal. Washington, D.C.: [publisher not identified], 1927.

MLA (9th ed.) Citation

Paul, J. W. How Are Men Killed in Mines by Falls of Roof and Coal. [publisher not identified], 1927.