@book { HabenhochfreizeitaktiveElternhochfreizeitaktiveKinder,
    title = "Haben hoch-freizeitaktive Eltern hoch-freizeitaktive Kinder?",
    author = "Manuela {Schöler}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/225099"
}