@book { InternationalStandardClassificationofOccupationsISCOInternationalSocioEconomicIndexofOccupationalStatusISEI,
    title = "International Standard Classification of Occupations (ISCO) & International Socio-Economic Index of Occupational Status (ISEI)",
    author = "Ricarda {Albrecht}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656423072",
    url = "https://www.hausarbeiten.de/document/213714"
}