@book { ThePolishCivilService,
    title = "The Polish Civil Service",
    author = "Weronika {Tkocz}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638155045",
    url = "https://www.hausarbeiten.de/document/8566"
}