@book { FamilySchoolYouthCulture,
    title = "Family, School, Youth Culture",
    author = "Heinz-Hermann {Krüger} and Werner {Helsper}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104682"
}