Knots untied:
or, Ways and by-ways in the hidden life of American detectives.
By Officer George S. McWatters.

APA Citation

McWatters, G. S. (1871). Knots untied: or, Ways and by-ways in the hidden life of American detectives. Hartford: J. B. Burr and Hyde.

MLA Citation

McWatters, George S. Knots Untied: Or, Ways And By-ways In the Hidden Life of American Detectives. Hartford: J. B. Burr and Hyde, 1871.

Warning: These citations may not always be complete (especially for serials).