@book{44986,
	author = {Tönnies, Ferdinand and Harris, José},
	title = {Community and civil society},
	publisher = {Cambridge University Press},
	year = {2001},
	series = {Cambridge Texts in the History of Political Thought.},
	address = {Cambridge (Inglaterra)},
	url = { http://www.loc.gov/catdir/toc/cam022/00046753.html}
}
