@book { NewPublicManagementinderStadtverwaltungMannheim,
    title = "New Public Management in der Stadtverwaltung Mannheim",
    author = "Jessica {Kogel}",
    year = "2021",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/1164085"
}