APA (7th ed.) Citation

Forbes, C. R. (1926). Progress in use of 1-inch steel in Tri-State lead and zinc district. [publisher not identified].

Chicago Style (17th ed.) Citation

Forbes, Carroll Ralph. Progress in Use of 1-inch Steel in Tri-State Lead and Zinc District. Washington, D.C.: [publisher not identified], 1926.

MLA (9th ed.) Citation

Forbes, Carroll Ralph. Progress in Use of 1-inch Steel in Tri-State Lead and Zinc District. [publisher not identified], 1926.