(1872). [Garman and Siegfried's patented steel tempering process, notice on purchase of license by U.S. government]. [publisher not identified].
Chicago Style (17th ed.) Citation[Garman and Siegfried's Patented Steel Tempering Process, Notice on Purchase of License by U.S. Government]. Washington, D.C.: [publisher not identified], 1872.
MLA (9th ed.) Citation[Garman and Siegfried's Patented Steel Tempering Process, Notice on Purchase of License by U.S. Government]. [publisher not identified], 1872.
Warning: These citations may not always be 100% accurate.