APA (7th ed.) Citation

United States. Congress. House. Committee on Mines and Mining & ProQuest (Firm). (1916). Labor difficulties in the coal fields of Colorado. Letter from the President of the United States, transmitting report of the Colorado Coal Commission on the labor difficulties in the coal fields of Colorado during the years 1914 and 1915. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Congress. House. Committee on Mines and Mining and ProQuest (Firm). Labor Difficulties in the Coal Fields of Colorado. Letter from the President of the United States, Transmitting Report of the Colorado Coal Commission on the Labor Difficulties in the Coal Fields of Colorado During the Years 1914 and 1915. Washington: [publisher not identified], 1916.

MLA (9th ed.) Citation

United States. Congress. House. Committee on Mines and Mining and ProQuest (Firm). Labor Difficulties in the Coal Fields of Colorado. Letter from the President of the United States, Transmitting Report of the Colorado Coal Commission on the Labor Difficulties in the Coal Fields of Colorado During the Years 1914 and 1915. [publisher not identified], 1916.