New York City Police Department

==Further reading==
* Darien, Andrew T. ''Becoming New York's Finest: Race, Gender, and the Integration of the NYPD, 1935–1980''. New York: Palgrave Macmillan, 2013.
* {{Cite magazine |last=Elliot |first=Bryn |date=March–April 1997 |title=Bears in the Air: The US Air Police Perspective |magazine=[[Air Enthusiast]] |issue=68 |pages=46–51 |issn=0143-5450}} 
* Miller, Wilbur R. ''Cops and bobbies: Police authority in New York and London, 1830–1870'' (The Ohio State University Press, 1999)
* Monkkonen, Eric H. ''Police in Urban America, 1860–1920'' (2004)
* Richardson, James F. ''The New York Police, Colonial Times to 1901'' (Oxford University Press, 1970)
* Richardson, James F. "To Control the City: The New York Police in Historical Perspective". In ''Cities in American History'', eds. Kenneth T. Jackson and Stanley K. Schultz (1972) pp.&nbsp;3–13.
* Thale, Christopher. [https://journals.sagepub.com/doi/abs/10.1177/0096144206290384 "The Informal World of Police Patrol: New York City in the Early Twentieth Century"], ''Journal of Urban History'' (2007) 33#2 pp.&nbsp;183–216. {{doi|10.1177/0096144206290384}}.