@book { TauscheGraugegenWow,
    title = "Tausche Grau gegen Wow",
    subtitle = "In 4 Schritten zu einer positiven Ausstrahlung und echter Beliebtheit. Dein Charisma-Booster",
    author = "Ann-Kathrin {Reuter}",
    year = "2025",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1560995"
}