Marcus P. Norton's combined postmarking and stamp-canceling hand stamp patents.
MLA
United States. Marcus P. Norton's combined postmarking and stamp-canceling hand stamp patents. Washington : [publisher not identified], 1916.
APA
United States. (1916). Marcus P. Norton's combined postmarking and stamp-canceling hand stamp patents. Washington : [publisher not identified].
Chicago
United States. Marcus P. Norton's combined postmarking and stamp-canceling hand stamp patents. Washington : [publisher not identified], 1916.