@book { PlaybookStrategieAktivierung,
    title = "Playbook Strategie-Aktivierung",
    author = "Ansgar {Thießen} and Robert {Wreschniok}",
    year = "2022",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221395"
}