@book { EntlohnungvonBerufenen,
    title = "Entlohnung von Berufenen",
    author = "Holger {Sandker}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638071086",
    url = "https://www.hausarbeiten.de/document/88777"
}