@book { EmployeeRetentionManagementunddieHandlungsfelderderMitarbeiterbindung,
    title = "Employee Retention Management und die Handlungsfelder der Mitarbeiterbindung",
    author = "Christian {Liebhart}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836628204",
    url = "https://m.diplom.de/document/226707"
}