APA (7th ed.) Citation

Hull, W. A., & Ingberg, S. H. (1925). Fire resistance of concrete columns. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Hull, Walter A., and S. H. Ingberg. Fire Resistance of Concrete Columns. [Washington?]: U.S. Government Printing Office, 1925.

MLA (9th ed.) Citation

Hull, Walter A., and S. H. Ingberg. Fire Resistance of Concrete Columns. U.S. Government Printing Office, 1925.