@book { GreenFamilyGuide,
    title = "Green Family Guide",
    subtitle = "Nachhaltig leben und Geld sparen. Mit vielen alltagstauglichen Tipps und kindgerechten Mitmach-Ideen",
    author = "Stefanie {Schindler}",
    year = "2024",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1450349"
}