Carlson, Jennifer D. (2012). "Libertarianism". In Miller, Wilburn R., ed. The Social History of Crime and Punishment in America. London: Sage Publications. p. 1006. ISBN1412988764.
Comegna, Anthony; Gomez, Camillo (3 October 2018). "Libertarianism, Then and Now". Libertarianism. Cato Institute. "[...] Benjamin Tucker was the first American to really start using the term 'libertarian' as a self-identifier somewhere in the late 1870s or early 1880s." Retrieved 3 August 2020.
The Anarchist FAQ Editorial Collective (December 11, 2008). "150 years of Libertarian". Anarchist Writers. The Anarchist Library. Retrieved January 31, 2020.
