@book { WildeActionundsanfteWellness,
    title = "Wilde Action und sanfte Wellness",
    subtitle = "Die Zukunft der Freizeitbäder",
    author = "Alexander {Kock}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/228853"
}