@book{6219,
	author = {Γέμτος, Πέτρος Α.},
	title = {Μεθοδολογία των κοινωνικών επιστημών /},
	publisher = {Παπαζήσης,},
	year = {2016.},
	address = {Αθήνα :},
	edition = {5η έκδ.}
}