Safire, Nicole (1978). «"Machine politics"». Safire's Political Dictionary (1ª edición). Random House. pp. 391–392.
Glazer, Nathan; Monyhan, Daniel Patrick (1963). «The Irish». Beyond the Melting Pot: The Negroes, Puerto Ricans, Jews, Italians and Irish of New York. The MIT Press. p. 226. «Ed Flynn ran the Bronx from 1922 until his death in 1953.»
«political machine». Encyclopædia Britannica. Consultado el 6 de diciembre de 2008.
colorado.edu
autocww.colorado.edu
Political Machines, University of Colorado, Boulder, archivado desde el original el 8 de diciembre de 2009, consultado el 18 de febrero de 2012.
doi.org
dx.doi.org
Blumer, Herbert (1914–1915). «The City: Suggestions for the Investigation of Human Behavior in the City Environment». The American Journal of Sociology20 (5): 603. doi:10.1086/212433. «The political machine is in fact an attempt to maintain, inside the formal administrative organization of the city, the control of a primary group.»
Gosnell, Harold F. (Septiembre de 1933). «The Political Party versus the Political Machine». Annals of the American Academy of Political and Social Science169: 21-28. doi:10.1177/000271623316900104. «When the spoils element is predominant in a political organization, it is called a political machine.»
«The Political Crisis in the United States». The Twentieth century volumen=1(en inglés). Enero-Junio de 1877. «[...] the arrangements under which the managers of the political 'machine' controlled the convention system by the use of patronage, and controlled popular discontent by the convention system. Nor did the other ministers [...]».
