@book { Flirten,
    title = "Flirten",
    subtitle = "Wie wirke ich? Was kann ich sagen? Wie spiele ich meine Stärken aus?",
    author = "Nina {Deißler}",
    year = "2010",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403452"
}