@book{71689,
	author = {Freud, Sigmund,},
	title = {Massenpsychologie und Ich-Analyse},
	publisher = {Project Gutenberg,},
	year = {2010},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/Group_Psychology_and_the_Analysis_of_the_Ego Wikipedia page about this book: https://de.wikipedia.org/wiki/Massenpsychologie_und_Ich-Analyse},
	url = {https://www.gutenberg.org/ebooks/30843}
}