@book{70955,
	author = {Mill, John Stuart, and Laughlin, J. Laurence},
	title = {Principles of Political Economy :},
	publisher = {Project Gutenberg,},
	year = {2009},
	address = {Salt Lake City, UT :},
	note = {Release date is 2009-09-27},
	url = {https://www.gutenberg.org/ebooks/30107}
}