@book { TheIdeaofSocialActivityforOlderPeopleLocalPolicyImplementation,
    title = "The Idea of Social Activity for Older People – Local Policy Implementation",
    author = "Halina {Nadobnik}",
    year = "2025",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b23164",
    url = "https://www.peterlang.com/document/1593049"
}