APA (7th ed.) Citation

(1929). Iron and steel roofing. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Iron and Steel Roofing. [Washington?]: U.S. Government Printing Office, 1929.

MLA (9th ed.) Citation

Iron and Steel Roofing. U.S. Government Printing Office, 1929.

Warning: These citations may not always be 100% accurate.