@book { AufstellungsarbeitinOrganisationen,
    title = "Aufstellungsarbeit in Organisationen",
    author = "Andreas {Tapken} and Klaus {Wübbelmann}",
    year = "2021",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1219145"
}