@book { PolitiquessocialesSocialPolicies,
    title = "Politiques sociales / Social Policies",
    author = "Jean-Claude {Barbier} and Marie-Thérèse {Letablier}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    url = "https://www.peterlang.com/document/1104446"
}