@book{67988,
	author = {Ketele, Jean-Marie de and Roegiers, Xavier},
	title = {Méthodologie du recueil d'informations},
	publisher = {De Boeck Université},
	year = {1998},
	series = {Méthodes en sciences humaines},
	address = {Paris},
	edition = {3e éd.}
}