@book { TeamleitunginderPflege,
    title = "Teamleitung in der Pflege",
    author = "Christian {Lummer}",
    year = "2018",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/428302"
}