@book { ALiteratureReviewontheImpactofInvestmentinHumanCapitalonEconomicSuccess,
    title = "A Literature Review on the Impact of Investment in Human Capital on Economic Success",
    author = "Gina {Roberts}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832483654",
    url = "https://m.diplom.de/document/223557"
}